Index: chrome/browser/page_load_metrics/metrics_navigation_throttle.h |
diff --git a/chrome/browser/page_load_metrics/metrics_navigation_throttle.h b/chrome/browser/page_load_metrics/metrics_navigation_throttle.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..64a3ebfa4fe03b698cec14d76dfb40e21f3ecef4 |
--- /dev/null |
+++ b/chrome/browser/page_load_metrics/metrics_navigation_throttle.h |
@@ -0,0 +1,36 @@ |
+// 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 CHROME_BROWSER_PAGE_LOAD_METRICS_METRICS_NAVIGATION_THROTTLE_H_ |
+#define CHROME_BROWSER_PAGE_LOAD_METRICS_METRICS_NAVIGATION_THROTTLE_H_ |
+ |
+#include <memory> |
+ |
+#include "base/macros.h" |
+#include "content/public/browser/navigation_throttle.h" |
+ |
+namespace page_load_metrics { |
+ |
+// This class is used to forward calls to the MetricsWebContentsObserver. |
+// Namely, WillStartRequest() is called on NavigationThrottles, but not on |
+// WebContentsObservers. Data from the NavigationHandle accessed at this point |
+// is used to obtain more reliable abort metrics (like page transition type). |
+class MetricsNavigationThrottle : public content::NavigationThrottle { |
+ public: |
+ static std::unique_ptr<content::NavigationThrottle> Create( |
+ content::NavigationHandle* handle); |
+ ~MetricsNavigationThrottle() override; |
+ |
+ // content::NavigationThrottle: |
+ content::NavigationThrottle::ThrottleCheckResult WillStartRequest() override; |
+ |
+ private: |
+ explicit MetricsNavigationThrottle(content::NavigationHandle* handle); |
+ |
+ DISALLOW_COPY_AND_ASSIGN(MetricsNavigationThrottle); |
+}; |
+ |
+} // namespace page_load_metrics |
+ |
+#endif // CHROME_BROWSER_PAGE_LOAD_METRICS_METRICS_NAVIGATION_THROTTLE_H_ |