Index: chrome/browser/page_load_metrics/observers/session_restore_page_load_metrics_observer.h |
diff --git a/chrome/browser/page_load_metrics/observers/session_restore_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/session_restore_page_load_metrics_observer.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f8c5011846fe0b3246cf339961382fa0ffc1f34e |
--- /dev/null |
+++ b/chrome/browser/page_load_metrics/observers/session_restore_page_load_metrics_observer.h |
@@ -0,0 +1,45 @@ |
+// Copyright 2017 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_OBSERVERS_SESSION_RESTORE_PAGE_LOAD_METRICS_OBSERVER_H_ |
+#define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_SESSION_RESTORE_PAGE_LOAD_METRICS_OBSERVER_H_ |
+ |
+#include "base/macros.h" |
+#include "chrome/browser/page_load_metrics/page_load_metrics_observer.h" |
+ |
+namespace internal { |
+ |
+extern const char kHistogramSessionRestoreForegroundTabFirstPaint[]; |
+extern const char kHistogramSessionRestoreForegroundTabFirstContentfulPaint[]; |
+extern const char kHistogramSessionRestoreForegroundTabFirstMeaningfulPaint[]; |
+ |
+} // namespace internal |
+ |
+// Record page load metrics of foreground tabs during session restore. This |
+// observer observes foreground tabs created by session restores only. It will |
+// stop observing if the tab gets hidden, reloaded, or navigated away. |
+class SessionRestorePageLoadMetricsObserver |
+ : public page_load_metrics::PageLoadMetricsObserver { |
+ public: |
+ SessionRestorePageLoadMetricsObserver(); |
+ |
+ // page_load_metrics::PageLoadMetricsObserver: |
+ ObservePolicy OnStart(content::NavigationHandle* navigation_handle, |
+ const GURL& currently_committed_url, |
+ bool started_in_foreground) override; |
+ void OnFirstPaintInPage( |
+ const page_load_metrics::mojom::PageLoadTiming& timing, |
+ const page_load_metrics::PageLoadExtraInfo& extra_info) override; |
+ void OnFirstContentfulPaintInPage( |
+ const page_load_metrics::mojom::PageLoadTiming& timing, |
+ const page_load_metrics::PageLoadExtraInfo& extra_info) override; |
+ void OnFirstMeaningfulPaintInMainFrameDocument( |
+ const page_load_metrics::mojom::PageLoadTiming& timing, |
+ const page_load_metrics::PageLoadExtraInfo& extra_info) override; |
+ |
+ private: |
+ DISALLOW_COPY_AND_ASSIGN(SessionRestorePageLoadMetricsObserver); |
+}; |
+ |
+#endif // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_SESSION_RESTORE_PAGE_LOAD_METRICS_OBSERVER_H_ |