[page_load_metrics] User Initiated Abort Tracking (Observer version)

chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4edf118026b6ebf10cf2e900fba987d9a4cc56e8
--- /dev/null
+++ b/chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.cc
@@ -0,0 +1,89 @@
+// 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.
+
+#include "chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h"
+
+#include "components/page_load_metrics/browser/page_load_metrics_util.h"
+
+using page_load_metrics::UserAbortType;
+
+AbortsPageLoadMetricsObserver::AbortsPageLoadMetricsObserver() {}
+
+void AbortsPageLoadMetricsObserver::OnComplete(
+    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::PageLoadExtraInfo& extra_info) {
+  UserAbortType abort_type = extra_info.abort_type;
+  if (abort_type == UserAbortType::ABORT_NONE)
+    return;
+
+  const base::TimeDelta& time_to_abort = extra_info.time_to_abort;
+  DCHECK(!time_to_abort.is_zero());
+
+  // Loads are not considered aborts if they painted before the abort event.
+  if (!timing.first_paint.is_zero() && timing.first_paint < time_to_abort)
+    return;
+
+  // Don't log abort times if the page was backgrounded before the abort event.
+  if (!EventOccurredInForeground(time_to_abort, extra_info))
+    return;
+
+  // If |timing.IsEmpty()|, then this load was not tracked by the renderer. It
+  // is impossible to know whether the abort signals came before the page
+  // painted.
+  if (extra_info.has_commit && !timing.IsEmpty()) {
+    switch (abort_type) {
+      case UserAbortType::ABORT_RELOAD:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortReloadBeforePaint, time_to_abort);
+        break;
+      case UserAbortType::ABORT_FORWARD_BACK:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortForwardBackBeforePaint,
+                            time_to_abort);
+        break;
+      case UserAbortType::ABORT_NEW_NAVIGATION:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortNewNavigationBeforePaint,
+                            time_to_abort);
+        break;
+      case UserAbortType::ABORT_STOP:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortStopBeforePaint, time_to_abort);
+        break;
+      case UserAbortType::ABORT_CLOSE:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortCloseBeforePaint, time_to_abort);
+        break;
+      case UserAbortType::ABORT_OTHER:
+        DLOG(FATAL)
+            << "Received UserAbortType::ABORT_OTHER for committed load.";
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+  } else {
+    DCHECK(timing.IsEmpty());
+    switch (abort_type) {
+      case UserAbortType::ABORT_RELOAD:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortReloadBeforeCommit, time_to_abort);
+        break;
+      case UserAbortType::ABORT_FORWARD_BACK:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortForwardBackBeforeCommit,
+                            time_to_abort);
+        break;
+      case UserAbortType::ABORT_NEW_NAVIGATION:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortNewNavigationBeforeCommit,
+                            time_to_abort);
+        break;
+      case UserAbortType::ABORT_STOP:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortStopBeforeCommit, time_to_abort);
+        break;
+      case UserAbortType::ABORT_CLOSE:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortCloseBeforePaint, time_to_abort);
+        break;
+      case UserAbortType::ABORT_OTHER:
+        PAGE_LOAD_HISTOGRAM(kHistogramAbortOtherBeforeCommit, time_to_abort);
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+  }
+}