| // Copyright 2019 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 CHROME_BROWSER_UI_WEBUI_WEBUI_LOAD_TIMER_H_ |
| #define CHROME_BROWSER_UI_WEBUI_WEBUI_LOAD_TIMER_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/timer/elapsed_timer.h" |
| #include "content/public/browser/web_contents_observer.h" |
| |
| // Measures and reports page load times for WebUI. |
| class WebuiLoadTimer : public content::WebContentsObserver { |
| public: |
| // Load times are reported to UMA using the provided strings which |
| // must not be empty. |
| // * |document_initial_load_uma_id| - corresponds to DocumentLoadedInFrame |
| // * |document_load_completed_uma_id| - corresponds to |
| // DocumentOnLoadCompletedInMainFrame |
| WebuiLoadTimer(content::WebContents* web_contents, |
| const std::string& document_initial_load_uma_id, |
| const std::string& document_load_completed_uma_id); |
| ~WebuiLoadTimer() override; |
| |
| // WebContentsObserver |
| void DidStartNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| void DocumentLoadedInFrame( |
| content::RenderFrameHost* render_frame_host) override; |
| void DocumentOnLoadCompletedInMainFrame() override; |
| |
| private: |
| std::string document_initial_load_uma_id_; |
| std::string document_load_completed_uma_id_; |
| std::unique_ptr<base::ElapsedTimer> timer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(WebuiLoadTimer); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_WEBUI_WEBUI_LOAD_TIMER_H_ |