[page_load_metrics] User Initiated Abort Tracking (Observer version)

chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..6ae1a852e1724d90d97537d8398253743ea05fd0
--- /dev/null
+++ b/chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h
@@ -0,0 +1,40 @@
+// Copyright 2015 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_ABORTS_PAGE_LOAD_METRICS_OBSERVER_H_
+#define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_ABORTS_PAGE_LOAD_METRICS_OBSERVER_H_
+
+#include "components/page_load_metrics/browser/page_load_metrics_observer.h"
+
+namespace internal {
+
+extern const char kHistogramAbortForwardBackBeforeCommit[];
+extern const char kHistogramAbortReloadBeforeCommit[];
+extern const char kHistogramAbortNewNavigationBeforeCommit[];
+extern const char kHistogramAbortStopBeforeCommit[];
+extern const char kHistogramAbortCloseBeforeCommit[];
+extern const char kHistogramAbortOtherBeforeCommit[];
+extern const char kHistogramAbortForwardBackBeforePaint[];
+extern const char kHistogramAbortReloadBeforePaint[];
+extern const char kHistogramAbortNewNavigationBeforePaint[];
+extern const char kHistogramAbortStopBeforePaint[];
+extern const char kHistogramAbortCloseBeforePaint[];
+
+}  // namespace internal
+
+class AbortsPageLoadMetricsObserver
+    : public page_load_metrics::PageLoadMetricsObserver {
+ public:
+  AbortsPageLoadMetricsObserver();
+
+  // page_load_metrics::PageLoadMetricsObserver:
+  void OnComplete(
+      const page_load_metrics::PageLoadTiming& timing,
+      const page_load_metrics::PageLoadExtraInfo& extra_info) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AbortsPageLoadMetricsObserver);
+};
+
+#endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_ABORTS_PAGE_LOAD_METRICS_OBSERVER_H_