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| 1 // Copyright 2016 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_BROWSER_PAGE_LOAD_METRICS_METRICS_NAVIGATION_THROTTLE_H_ |
| 6 #define CHROME_BROWSER_PAGE_LOAD_METRICS_METRICS_NAVIGATION_THROTTLE_H_ |
| 7 |
| 8 #include <memory> |
| 9 |
| 10 #include "base/macros.h" |
| 11 #include "content/public/browser/navigation_throttle.h" |
| 12 |
| 13 namespace page_load_metrics { |
| 14 |
| 15 // This class is used to forward calls to the MetricsWebContentsObserver. |
| 16 // Namely, WillStartRequest() is called on NavigationThrottles, but not on |
| 17 // WebContentsObservers. Data from the NavigationHandle accessed at this point |
| 18 // is used to obtain more reliable abort metrics (like page transition type). |
| 19 class MetricsNavigationThrottle : public content::NavigationThrottle { |
| 20 public: |
| 21 static std::unique_ptr<content::NavigationThrottle> Create( |
| 22 content::NavigationHandle* handle); |
| 23 ~MetricsNavigationThrottle() override; |
| 24 |
| 25 // content::NavigationThrottle: |
| 26 content::NavigationThrottle::ThrottleCheckResult WillStartRequest() override; |
| 27 |
| 28 private: |
| 29 explicit MetricsNavigationThrottle(content::NavigationHandle* handle); |
| 30 |
| 31 DISALLOW_COPY_AND_ASSIGN(MetricsNavigationThrottle); |
| 32 }; |
| 33 |
| 34 } // namespace page_load_metrics |
| 35 |
| 36 #endif // CHROME_BROWSER_PAGE_LOAD_METRICS_METRICS_NAVIGATION_THROTTLE_H_ |
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