| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/permissions/permission_manager.h" |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "base/callback.h" |
| #include "base/memory/ptr_util.h" |
| #include "build/build_config.h" |
| #include "chrome/browser/background_sync/background_sync_permission_context.h" |
| #include "chrome/browser/content_settings/host_content_settings_map_factory.h" |
| #include "chrome/browser/generic_sensor/sensor_permission_context.h" |
| #include "chrome/browser/media/midi_permission_context.h" |
| #include "chrome/browser/media/midi_sysex_permission_context.h" |
| #include "chrome/browser/media/webrtc/media_stream_device_permission_context.h" |
| #include "chrome/browser/notifications/notification_permission_context.h" |
| #include "chrome/browser/permissions/permission_context_base.h" |
| #include "chrome/browser/permissions/permission_manager_factory.h" |
| #include "chrome/browser/permissions/permission_request_id.h" |
| #include "chrome/browser/permissions/permission_result.h" |
| #include "chrome/browser/permissions/permission_uma_util.h" |
| #include "chrome/browser/profiles/profile.h" |
| #include "chrome/browser/storage/durable_storage_permission_context.h" |
| #include "chrome/browser/tab_contents/tab_util.h" |
| #include "chrome/browser/vr/vr_tab_helper.h" |
| #include "chrome/common/features.h" |
| #include "components/content_settings/core/browser/host_content_settings_map.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "content/public/browser/permission_type.h" |
| #include "content/public/browser/render_frame_host.h" |
| #include "content/public/browser/render_process_host.h" |
| #include "content/public/browser/web_contents.h" |
| #include "device/vr/features/features.h" |
| #include "ppapi/features/features.h" |
| |
| #if BUILDFLAG(ENABLE_PLUGINS) |
| #include "chrome/browser/plugins/flash_permission_context.h" |
| #endif |
| |
| #if defined(OS_ANDROID) || defined(OS_CHROMEOS) |
| #include "chrome/browser/media/protected_media_identifier_permission_context.h" |
| #endif |
| |
| #if defined(OS_ANDROID) |
| #include "chrome/browser/geolocation/geolocation_permission_context_android.h" |
| #else |
| #include "chrome/browser/geolocation/geolocation_permission_context.h" |
| #endif |
| |
| using blink::mojom::PermissionStatus; |
| using content::PermissionType; |
| |
| namespace { |
| |
| // Helper method to convert ContentSetting to PermissionStatus. |
| PermissionStatus ContentSettingToPermissionStatus(ContentSetting setting) { |
| switch (setting) { |
| case CONTENT_SETTING_ALLOW: |
| return PermissionStatus::GRANTED; |
| case CONTENT_SETTING_BLOCK: |
| return PermissionStatus::DENIED; |
| case CONTENT_SETTING_ASK: |
| return PermissionStatus::ASK; |
| case CONTENT_SETTING_SESSION_ONLY: |
| case CONTENT_SETTING_DETECT_IMPORTANT_CONTENT: |
| case CONTENT_SETTING_DEFAULT: |
| case CONTENT_SETTING_NUM_SETTINGS: |
| break; |
| } |
| |
| NOTREACHED(); |
| return PermissionStatus::DENIED; |
| } |
| |
| // Helper method to convert PermissionType to ContentSettingType. |
| ContentSettingsType PermissionTypeToContentSetting(PermissionType permission) { |
| switch (permission) { |
| case PermissionType::MIDI: |
| return CONTENT_SETTINGS_TYPE_MIDI; |
| case PermissionType::MIDI_SYSEX: |
| return CONTENT_SETTINGS_TYPE_MIDI_SYSEX; |
| case PermissionType::PUSH_MESSAGING: |
| return CONTENT_SETTINGS_TYPE_PUSH_MESSAGING; |
| case PermissionType::NOTIFICATIONS: |
| return CONTENT_SETTINGS_TYPE_NOTIFICATIONS; |
| case PermissionType::GEOLOCATION: |
| return CONTENT_SETTINGS_TYPE_GEOLOCATION; |
| case PermissionType::PROTECTED_MEDIA_IDENTIFIER: |
| #if defined(OS_ANDROID) || defined(OS_CHROMEOS) |
| return CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER; |
| #else |
| NOTIMPLEMENTED(); |
| break; |
| #endif |
| case PermissionType::DURABLE_STORAGE: |
| return CONTENT_SETTINGS_TYPE_DURABLE_STORAGE; |
| case PermissionType::AUDIO_CAPTURE: |
| return CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC; |
| case PermissionType::VIDEO_CAPTURE: |
| return CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA; |
| case PermissionType::BACKGROUND_SYNC: |
| return CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC; |
| case PermissionType::FLASH: |
| return CONTENT_SETTINGS_TYPE_PLUGINS; |
| case PermissionType::SENSORS: |
| return CONTENT_SETTINGS_TYPE_SENSORS; |
| case PermissionType::NUM: |
| // This will hit the NOTREACHED below. |
| break; |
| } |
| |
| NOTREACHED() << "Unknown content setting for permission " |
| << static_cast<int>(permission); |
| return CONTENT_SETTINGS_TYPE_DEFAULT; |
| } |
| |
| void SubscriptionCallbackWrapper( |
| const base::Callback<void(PermissionStatus)>& callback, |
| ContentSetting content_setting) { |
| callback.Run(ContentSettingToPermissionStatus(content_setting)); |
| } |
| |
| void PermissionStatusCallbackWrapper( |
| const base::Callback<void(PermissionStatus)>& callback, |
| const std::vector<ContentSetting>& vector) { |
| DCHECK_EQ(1ul, vector.size()); |
| callback.Run(ContentSettingToPermissionStatus(vector[0])); |
| } |
| |
| void PermissionStatusVectorCallbackWrapper( |
| const base::Callback<void(const std::vector<PermissionStatus>&)>& callback, |
| const std::vector<ContentSetting>& content_settings) { |
| std::vector<PermissionStatus> permission_statuses; |
| std::transform(content_settings.begin(), content_settings.end(), |
| back_inserter(permission_statuses), |
| ContentSettingToPermissionStatus); |
| callback.Run(permission_statuses); |
| } |
| |
| void ContentSettingCallbackWraper( |
| const base::Callback<void(ContentSetting)>& callback, |
| const std::vector<ContentSetting>& vector) { |
| DCHECK_EQ(1ul, vector.size()); |
| callback.Run(vector[0]); |
| } |
| |
| } // anonymous namespace |
| |
| class PermissionManager::PendingRequest { |
| public: |
| PendingRequest( |
| content::RenderFrameHost* render_frame_host, |
| const std::vector<ContentSettingsType>& permissions, |
| const base::Callback<void(const std::vector<ContentSetting>&)>& callback) |
| : render_process_id_(render_frame_host->GetProcess()->GetID()), |
| render_frame_id_(render_frame_host->GetRoutingID()), |
| callback_(callback), |
| permissions_(permissions), |
| results_(permissions.size(), CONTENT_SETTING_BLOCK), |
| remaining_results_(permissions.size()) {} |
| |
| void SetContentSetting(int permission_id, ContentSetting content_setting) { |
| DCHECK(!IsComplete()); |
| |
| results_[permission_id] = content_setting; |
| --remaining_results_; |
| } |
| |
| bool IsComplete() const { |
| return remaining_results_ == 0; |
| } |
| |
| int render_process_id() const { return render_process_id_; } |
| int render_frame_id() const { return render_frame_id_; } |
| |
| const base::Callback<void(const std::vector<ContentSetting>&)> callback() |
| const { |
| return callback_; |
| } |
| |
| std::vector<ContentSettingsType> permissions() const { |
| return permissions_; |
| } |
| |
| std::vector<ContentSetting> results() const { return results_; } |
| |
| private: |
| int render_process_id_; |
| int render_frame_id_; |
| const base::Callback<void(const std::vector<ContentSetting>&)> callback_; |
| std::vector<ContentSettingsType> permissions_; |
| std::vector<ContentSetting> results_; |
| size_t remaining_results_; |
| }; |
| |
| // Object to track the callback passed to |
| // PermissionContextBase::RequestPermission. The callback passed in will never |
| // be run when a permission prompt has been ignored, but it's important that we |
| // know when a prompt is ignored to clean up |pending_requests_| correctly. |
| // If the callback is destroyed without being run, the destructor here will |
| // cancel the request to clean up. |
| class PermissionManager::PermissionResponseCallback { |
| public: |
| PermissionResponseCallback( |
| const base::WeakPtr<PermissionManager>& permission_manager, |
| int request_id, |
| int permission_id) |
| : permission_manager_(permission_manager), |
| request_id_(request_id), |
| permission_id_(permission_id), |
| request_answered_(false) {} |
| |
| ~PermissionResponseCallback() { |
| if (!request_answered_ && |
| permission_manager_->pending_requests_.Lookup(request_id_)) { |
| permission_manager_->pending_requests_.Remove(request_id_); |
| } |
| } |
| |
| void OnPermissionsRequestResponseStatus(ContentSetting content_setting) { |
| request_answered_ = true; |
| permission_manager_->OnPermissionsRequestResponseStatus( |
| request_id_, permission_id_, content_setting); |
| } |
| |
| private: |
| base::WeakPtr<PermissionManager> permission_manager_; |
| int request_id_; |
| int permission_id_; |
| |
| bool request_answered_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PermissionResponseCallback); |
| }; |
| |
| struct PermissionManager::Subscription { |
| ContentSettingsType permission; |
| GURL requesting_origin; |
| GURL embedding_origin; |
| base::Callback<void(ContentSetting)> callback; |
| ContentSetting current_value; |
| }; |
| |
| // static |
| PermissionManager* PermissionManager::Get(Profile* profile) { |
| return PermissionManagerFactory::GetForProfile(profile); |
| } |
| |
| PermissionManager::PermissionManager(Profile* profile) |
| : profile_(profile), |
| weak_ptr_factory_(this) { |
| permission_contexts_[CONTENT_SETTINGS_TYPE_MIDI_SYSEX] = |
| base::MakeUnique<MidiSysexPermissionContext>(profile); |
| permission_contexts_[CONTENT_SETTINGS_TYPE_MIDI] = |
| base::MakeUnique<MidiPermissionContext>(profile); |
| permission_contexts_[CONTENT_SETTINGS_TYPE_PUSH_MESSAGING] = |
| base::MakeUnique<NotificationPermissionContext>( |
| profile, CONTENT_SETTINGS_TYPE_PUSH_MESSAGING); |
| permission_contexts_[CONTENT_SETTINGS_TYPE_NOTIFICATIONS] = |
| base::MakeUnique<NotificationPermissionContext>( |
| profile, CONTENT_SETTINGS_TYPE_NOTIFICATIONS); |
| #if !defined(OS_ANDROID) |
| permission_contexts_[CONTENT_SETTINGS_TYPE_GEOLOCATION] = |
| base::MakeUnique<GeolocationPermissionContext>(profile); |
| #else |
| permission_contexts_[CONTENT_SETTINGS_TYPE_GEOLOCATION] = |
| base::MakeUnique<GeolocationPermissionContextAndroid>(profile); |
| #endif |
| #if defined(OS_CHROMEOS) || defined(OS_ANDROID) |
| permission_contexts_[CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER] = |
| base::MakeUnique<ProtectedMediaIdentifierPermissionContext>(profile); |
| #endif |
| permission_contexts_[CONTENT_SETTINGS_TYPE_DURABLE_STORAGE] = |
| base::MakeUnique<DurableStoragePermissionContext>(profile); |
| permission_contexts_[CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC] = |
| base::MakeUnique<MediaStreamDevicePermissionContext>( |
| profile, CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC); |
| permission_contexts_[CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA] = |
| base::MakeUnique<MediaStreamDevicePermissionContext>( |
| profile, CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA); |
| permission_contexts_[CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC] = |
| base::MakeUnique<BackgroundSyncPermissionContext>(profile); |
| #if BUILDFLAG(ENABLE_PLUGINS) |
| permission_contexts_[CONTENT_SETTINGS_TYPE_PLUGINS] = |
| base::MakeUnique<FlashPermissionContext>(profile); |
| #endif |
| permission_contexts_[CONTENT_SETTINGS_TYPE_SENSORS] = |
| base::MakeUnique<SensorPermissionContext>(profile); |
| } |
| |
| PermissionManager::~PermissionManager() { |
| DCHECK(pending_requests_.IsEmpty()); |
| DCHECK(subscriptions_.IsEmpty()); |
| } |
| |
| void PermissionManager::Shutdown() { |
| if (!subscriptions_.IsEmpty()) { |
| HostContentSettingsMapFactory::GetForProfile(profile_) |
| ->RemoveObserver(this); |
| subscriptions_.Clear(); |
| } |
| } |
| |
| int PermissionManager::RequestPermission( |
| ContentSettingsType content_settings_type, |
| content::RenderFrameHost* render_frame_host, |
| const GURL& requesting_origin, |
| bool user_gesture, |
| const base::Callback<void(ContentSetting)>& callback) { |
| return RequestPermissions( |
| std::vector<ContentSettingsType>(1, content_settings_type), |
| render_frame_host, requesting_origin, user_gesture, |
| base::Bind(&ContentSettingCallbackWraper, callback)); |
| } |
| |
| int PermissionManager::RequestPermissions( |
| const std::vector<ContentSettingsType>& permissions, |
| content::RenderFrameHost* render_frame_host, |
| const GURL& requesting_origin, |
| bool user_gesture, |
| const base::Callback<void(const std::vector<ContentSetting>&)>& callback) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| if (permissions.empty()) { |
| callback.Run(std::vector<ContentSetting>()); |
| return kNoPendingOperation; |
| } |
| |
| content::WebContents* web_contents = |
| content::WebContents::FromRenderFrameHost(render_frame_host); |
| |
| if (vr::VrTabHelper::IsInVr(web_contents)) { |
| callback.Run( |
| std::vector<ContentSetting>(permissions.size(), CONTENT_SETTING_BLOCK)); |
| return kNoPendingOperation; |
| } |
| |
| GURL embedding_origin = web_contents->GetLastCommittedURL().GetOrigin(); |
| |
| int request_id = pending_requests_.Add(base::MakeUnique<PendingRequest>( |
| render_frame_host, permissions, callback)); |
| |
| const PermissionRequestID request(render_frame_host, request_id); |
| |
| for (size_t i = 0; i < permissions.size(); ++i) { |
| const ContentSettingsType permission = permissions[i]; |
| |
| PermissionContextBase* context = GetPermissionContext(permission); |
| DCHECK(context); |
| auto callback = base::MakeUnique<PermissionResponseCallback>( |
| weak_ptr_factory_.GetWeakPtr(), request_id, i); |
| context->RequestPermission( |
| web_contents, request, requesting_origin, user_gesture, |
| base::Bind( |
| &PermissionResponseCallback::OnPermissionsRequestResponseStatus, |
| base::Passed(&callback))); |
| } |
| |
| // The request might have been resolved already. |
| if (!pending_requests_.Lookup(request_id)) |
| return kNoPendingOperation; |
| |
| return request_id; |
| } |
| |
| PermissionResult PermissionManager::GetPermissionStatus( |
| ContentSettingsType permission, |
| const GURL& requesting_origin, |
| const GURL& embedding_origin) { |
| return GetPermissionStatusHelper(permission, nullptr /* render_frame_host */, |
| requesting_origin, embedding_origin); |
| } |
| |
| PermissionResult PermissionManager::GetPermissionStatusForFrame( |
| ContentSettingsType permission, |
| content::RenderFrameHost* render_frame_host, |
| const GURL& requesting_origin) { |
| content::WebContents* web_contents = |
| content::WebContents::FromRenderFrameHost(render_frame_host); |
| GURL embedding_origin = web_contents->GetLastCommittedURL().GetOrigin(); |
| return GetPermissionStatusHelper(permission, render_frame_host, |
| requesting_origin, embedding_origin); |
| } |
| |
| int PermissionManager::RequestPermission( |
| PermissionType permission, |
| content::RenderFrameHost* render_frame_host, |
| const GURL& requesting_origin, |
| bool user_gesture, |
| const base::Callback<void(PermissionStatus)>& callback) { |
| ContentSettingsType content_settings_type = |
| PermissionTypeToContentSetting(permission); |
| return RequestPermissions( |
| std::vector<ContentSettingsType>(1, content_settings_type), |
| render_frame_host, requesting_origin, user_gesture, |
| base::Bind(&PermissionStatusCallbackWrapper, callback)); |
| } |
| |
| int PermissionManager::RequestPermissions( |
| const std::vector<PermissionType>& permissions, |
| content::RenderFrameHost* render_frame_host, |
| const GURL& requesting_origin, |
| bool user_gesture, |
| const base::Callback<void(const std::vector<PermissionStatus>&)>& |
| callback) { |
| std::vector<ContentSettingsType> content_settings_types; |
| std::transform(permissions.begin(), permissions.end(), |
| back_inserter(content_settings_types), |
| PermissionTypeToContentSetting); |
| return RequestPermissions( |
| content_settings_types, render_frame_host, requesting_origin, |
| user_gesture, |
| base::Bind(&PermissionStatusVectorCallbackWrapper, callback)); |
| } |
| |
| PermissionContextBase* PermissionManager::GetPermissionContext( |
| ContentSettingsType type) { |
| const auto& it = permission_contexts_.find(type); |
| return it == permission_contexts_.end() ? nullptr : it->second.get(); |
| } |
| |
| void PermissionManager::OnPermissionsRequestResponseStatus( |
| int request_id, |
| int permission_id, |
| ContentSetting content_setting) { |
| PendingRequest* pending_request = pending_requests_.Lookup(request_id); |
| if (!pending_request) |
| return; |
| |
| pending_request->SetContentSetting(permission_id, content_setting); |
| |
| if (!pending_request->IsComplete()) |
| return; |
| |
| pending_request->callback().Run(pending_request->results()); |
| pending_requests_.Remove(request_id); |
| } |
| |
| void PermissionManager::CancelPermissionRequest(int request_id) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| PendingRequest* pending_request = pending_requests_.Lookup(request_id); |
| if (!pending_request) |
| return; |
| |
| content::WebContents* web_contents = tab_util::GetWebContentsByFrameID( |
| pending_request->render_process_id(), pending_request->render_frame_id()); |
| DCHECK(web_contents); |
| |
| const PermissionRequestID request(pending_request->render_process_id(), |
| pending_request->render_frame_id(), |
| request_id); |
| for (ContentSettingsType permission : pending_request->permissions()) { |
| PermissionContextBase* context = GetPermissionContext(permission); |
| if (!context) |
| continue; |
| context->CancelPermissionRequest(web_contents, request); |
| } |
| // The request should be automatically removed from |pending_requests_| as a |
| // result of it being cancelled but not necessarily immediately. |
| } |
| |
| void PermissionManager::ResetPermission(PermissionType permission, |
| const GURL& requesting_origin, |
| const GURL& embedding_origin) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| PermissionContextBase* context = |
| GetPermissionContext(PermissionTypeToContentSetting(permission)); |
| if (!context) |
| return; |
| |
| context->ResetPermission(requesting_origin.GetOrigin(), |
| embedding_origin.GetOrigin()); |
| } |
| |
| PermissionStatus PermissionManager::GetPermissionStatus( |
| PermissionType permission, |
| const GURL& requesting_origin, |
| const GURL& embedding_origin) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| PermissionResult result = |
| GetPermissionStatus(PermissionTypeToContentSetting(permission), |
| requesting_origin, embedding_origin); |
| |
| // TODO(benwells): split this into two functions, GetPermissionStatus and |
| // GetPermissionStatusForPermissionsAPI. |
| PermissionContextBase* context = |
| GetPermissionContext(PermissionTypeToContentSetting(permission)); |
| if (context) { |
| result = context->UpdatePermissionStatusWithDeviceStatus( |
| result, requesting_origin, embedding_origin); |
| } |
| |
| return ContentSettingToPermissionStatus(result.content_setting); |
| } |
| |
| int PermissionManager::SubscribePermissionStatusChange( |
| PermissionType permission, |
| const GURL& requesting_origin, |
| const GURL& embedding_origin, |
| const base::Callback<void(PermissionStatus)>& callback) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| if (subscriptions_.IsEmpty()) |
| HostContentSettingsMapFactory::GetForProfile(profile_)->AddObserver(this); |
| |
| ContentSettingsType content_type = PermissionTypeToContentSetting(permission); |
| auto subscription = base::MakeUnique<Subscription>(); |
| subscription->permission = content_type; |
| subscription->requesting_origin = requesting_origin; |
| subscription->embedding_origin = embedding_origin; |
| subscription->callback = base::Bind(&SubscriptionCallbackWrapper, callback); |
| |
| subscription->current_value = |
| GetPermissionStatus(content_type, requesting_origin, embedding_origin) |
| .content_setting; |
| |
| return subscriptions_.Add(std::move(subscription)); |
| } |
| |
| void PermissionManager::UnsubscribePermissionStatusChange(int subscription_id) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| // Whether |subscription_id| is known will be checked by the Remove() call. |
| subscriptions_.Remove(subscription_id); |
| |
| if (subscriptions_.IsEmpty()) |
| HostContentSettingsMapFactory::GetForProfile(profile_) |
| ->RemoveObserver(this); |
| } |
| |
| bool PermissionManager::IsPermissionKillSwitchOn( |
| ContentSettingsType permission) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| return GetPermissionContext(permission)->IsPermissionKillSwitchOn(); |
| } |
| |
| void PermissionManager::OnContentSettingChanged( |
| const ContentSettingsPattern& primary_pattern, |
| const ContentSettingsPattern& secondary_pattern, |
| ContentSettingsType content_type, |
| std::string resource_identifier) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| std::list<base::Closure> callbacks; |
| |
| for (SubscriptionsMap::iterator iter(&subscriptions_); |
| !iter.IsAtEnd(); iter.Advance()) { |
| Subscription* subscription = iter.GetCurrentValue(); |
| if (subscription->permission != content_type) |
| continue; |
| |
| if (primary_pattern.IsValid() && |
| !primary_pattern.Matches(subscription->requesting_origin)) |
| continue; |
| if (secondary_pattern.IsValid() && |
| !secondary_pattern.Matches(subscription->embedding_origin)) |
| continue; |
| |
| ContentSetting new_value = |
| GetPermissionStatus(subscription->permission, |
| subscription->requesting_origin, |
| subscription->embedding_origin) |
| .content_setting; |
| if (subscription->current_value == new_value) |
| continue; |
| |
| subscription->current_value = new_value; |
| |
| // Add the callback to |callbacks| which will be run after the loop to |
| // prevent re-entrance issues. |
| callbacks.push_back(base::Bind(subscription->callback, new_value)); |
| } |
| |
| for (const auto& callback : callbacks) |
| callback.Run(); |
| } |
| |
| PermissionResult PermissionManager::GetPermissionStatusHelper( |
| ContentSettingsType permission, |
| content::RenderFrameHost* render_frame_host, |
| const GURL& requesting_origin, |
| const GURL& embedding_origin) { |
| PermissionContextBase* context = GetPermissionContext(permission); |
| PermissionResult result = context->GetPermissionStatus( |
| render_frame_host, requesting_origin.GetOrigin(), |
| embedding_origin.GetOrigin()); |
| DCHECK(result.content_setting == CONTENT_SETTING_ALLOW || |
| result.content_setting == CONTENT_SETTING_ASK || |
| result.content_setting == CONTENT_SETTING_BLOCK); |
| return result; |
| } |