1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_ 6 #define CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_ 7 8 #include "base/basictypes.h" 9 #include "content/public/renderer/render_view_observer.h" 10 11 namespace content { 12 class DocumentState; 13 } 14 15 class PageLoadHistograms : public content::RenderViewObserver { 16 public: 17 explicit PageLoadHistograms(content::RenderView* render_view); 18 19 private: 20 // RenderViewObserver implementation. 21 virtual void FrameWillClose(blink::WebFrame* frame) OVERRIDE; 22 virtual void ClosePage() OVERRIDE; 23 24 // Dump all page load histograms appropriate for the given frame. 25 // 26 // This method will only dump once-per-instance, so it is safe to call 27 // multiple times. 28 // 29 // The time points we keep are 30 // request: time document was requested by user 31 // start: time load of document started 32 // commit: time load of document started 33 // finish_document: main document loaded, before onload() 34 // finish_all_loads: after onload() and all resources are loaded 35 // first_paint: first paint performed 36 // first_paint_after_load: first paint performed after load is finished 37 // begin: request if it was user requested, start otherwise 38 // 39 // It's possible for the request time not to be set, if a client 40 // redirect had been done (the user never requested the page) 41 // Also, it's possible to load a page without ever laying it out 42 // so first_paint and first_paint_after_load can be 0. 43 void Dump(blink::WebFrame* frame); 44 45 void LogPageLoadTime(const content::DocumentState* load_times, 46 const blink::WebDataSource* ds) const; 47 48 DISALLOW_COPY_AND_ASSIGN(PageLoadHistograms); 49 }; 50 51 #endif // CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_ 52
