| // Copyright 2016 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. |
| |
| #ifndef WebLoadingBehaviorFlag_h |
| #define WebLoadingBehaviorFlag_h |
| |
| namespace blink { |
| |
| // This enum tracks certain behavior Blink exhibits when loading a page. This is |
| // for use in metrics collection by the loading team, to evaluate experimental |
| // features and potential areas of improvement in the loading stack. The main |
| // consumer is the page_load_metrics component, which sends bit flags to the |
| // browser process for histogram splitting. |
| enum WebLoadingBehaviorFlag { |
| WebLoadingBehaviorNone = 0, |
| // Indicates that the page used the document.write evaluator to preload scan |
| // for resources inserted via document.write. |
| WebLoadingBehaviorDocumentWriteEvaluator = 1 << 0, |
| // Indicates that the page is controlled by a Service Worker. |
| WebLoadingBehaviorServiceWorkerControlled = 1 << 1, |
| // Indicates that the page has a synchronous, cross-origin document.written |
| // script. |
| WebLoadingBehaviorDocumentWriteBlock = 1 << 2, |
| // Indicates that the page is a reload and has a synchronous, cross-origin |
| // document.written script. |
| WebLoadingBehaviorDocumentWriteBlockReload = 1 << 3, |
| // The page loaded external CSS that generated a PreloadRequest via the |
| // CSSPreloaderResourceClient. |
| WebLoadingBehaviorCSSPreloadFound = 1 << 4, |
| }; |
| |
| } // namespace blink |
| |
| #endif // WebLoadingBehaviorFlag_h |
