Implement the infrastructure of creating WorkerFetchContext in worker global scope.
This CL implements the infrastructure of creating WorkerFetchContext in worker
global scope of Dedicated Worker, Shared Worker and Service Worker.
1. WorkerFetchContext for Dedicated Worker
1.1. DedicatedWorkerMessagingProxyProviderImpl::CreateWorkerMessagingProxy()
calls RenderFrameImpl::CreateWorkerFetchContext() on the main thread.
1.2. RenderFrameImpl::CreateWorkerFetchContext() gets the interface of
WorkerURLLoaderFactoryProvider which is implemented in the browser process
as WorkerURLLoaderFactoryProviderImpl, and creates a
WorkerFetchContextImpl with the interface. WorkerFetchContextImpl keeps
the interface as |provider_info_| until InitializeOnWorkerThread() is
called on the worker thread.
1.3. RenderFrameImpl::CreateWorkerFetchContext() copies the service worker
state (ServiceWorkerProviderID and IsControlledByServiceWorker) of the
frame to the WorkerFetchContextImpl.
1.4. ProvideWorkerFetchContextToWorker() creates a WorkerFetchContextHolder
which holds the WorkerFetchContextImpl and provides it to the
WorkerClients using the Supplement mechanism.
1.5. After the worker thread is created, the WorkerClients is reattached to
the worker thread in the constructor of WorkerGlobalScope.
1.6. WorkerGlobalScope::FetchContext() will be called to get the
WorkerFetchContext in ThreadableLoader::Create() When fetch() is called in
the worker thread. (This is not in this CL yet.)
1.7. When WorkerGlobalScope::FetchContext() is called for the first time,
WorkerFetchContext::Create() is called to get the WorkerFetchContextHolder
from the WorkerClients and take the WorkerFetchContextImpl from it and
create the WorkerFetchContext.
1.8. The constructor of WorkerFetchContext calls WorkerFetchContextImpl::
InitializeOnWorkerThread() which creates a ResourceDispatcher and calls
WorkerURLLoaderFactoryProviderImpl::GetURLLoaderFactoryAndRegisterClient()
in the browser process via mojo IPC with a request of URLLoaderFactory and
the pointer (ServiceWorkerWorkerClient) of itself.
1.9. WorkerURLLoaderFactoryProviderImpl::GetURLLoaderFactoryAndRegisterClient()
binds the request of URLLoaderFactory to ResourceMessageFilter and calls
ServiceWorkerContextWrapper::BindWorkerFetchContext() to bind the
ServiceWorkerWorkerClient (the pointer to WorkerFetchContextImpl in the
worker thread) with the parent frame's ServiceWorkerProviderHost. When the
controller service worker of the ServiceWorkerProviderHost changed,
WorkerFetchContextImpl::SetControllerServiceWorker() will be called via
mojo. So WorkerFetchContextImpl::IsControlledByServiceWorker() can return
the correct status.
1.10. WorkerFetchContext::CreateURLLoader() calls WorkerFetchContextImpl::
CreateURLLoader() which returns a new WebURLLoaderImpl with the pointer
of URLLoaderFactory.
2. WorkerFetchContext for Shared Worker is created almost same as the Dedicated
Worker. The only difference is that CreateWorkerFetchContext() is called in
WebSharedWorkerImpl::OnScriptLoaderFinished().
3. WorkerFetchContext for Service Worker
3.1. WebEmbeddedWorkerImpl::StartWorkerThread() calls
ServiceWorkerContextClient::CreateServiceWorkerFetchContext() on the main
thread.
3.2. ServiceWorkerContextClient::CreateServiceWorkerFetchContext() gets the
interface of WorkerURLLoaderFactoryProvider which is implemented in the
browser process as WorkerURLLoaderFactoryProviderImpl, and creates a
ServiceWorkerFetchContextImpl with the interface.
ServiceWorkerFetchContextImpl keeps the interface as |provider_info_|
until InitializeOnWorkerThread() is called on the worker thread.
3.3. In WebEmbeddedWorkerImpl::StartWorkerThread(), the fetch context related
information (ex: DataSaverEnabled) is set to the
ServiceWorkerFetchContextImpl. (This is not in this CL yet.)
3.4. Same as 1.4. ProvideWorkerFetchContextToWorker() creates a
WorkerFetchContextHolder which holds the ServiceWorkerFetchContextImpl and
provides it to the WorkerClientsusing the Supplement mechanism.
3.5. Same as 1.5. the WorkerClients is reattached to the worker thread.
3.6. Same as 1.6.
3.7. Same as 1.7. When WorkerGlobalScope::FetchContext() is called for the
first time, WorkerFetchContext::Create() is called to get the
WorkerFetchContextHolder from the WorkerClients and take the
ServiceWorkerFetchContextImpl from it and create the WorkerFetchContext.
3.8. The constructor of WorkerFetchContext calls ServiceWorkerFetchContextImpl
::InitializeOnWorkerThread() which creates a ResourceDispatcher and calls
WorkerURLLoaderFactoryProviderImpl::GetURLLoaderFactory() in the browser
process via mojo IPC with a request of URLLoaderFactory.
3.9. WorkerURLLoaderFactoryProviderImpl::GetURLLoaderFactory() binds the
request of URLLoaderFactory to ResourceMessageFilter.
3.10. WorkerFetchContext::CreateURLLoader() calls
ServiceWorkerFetchContextImpl::CreateURLLoader() which returns a new
WebURLLoaderImpl with the pointer of URLLoaderFactory.
BUG=443374
Review-Url: https://codereview.chromium.org/2804843005
Cr-Commit-Position: refs/heads/master@{#467200}
44 files changed
