[Page Load Metrics] Add page load metrics for omnibox.

chrome/browser/page_load_metrics/observers/omnibox_suggestion_used_page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/omnibox_suggestion_used_page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/omnibox_suggestion_used_page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/omnibox_suggestion_used_page_load_metrics_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..58d13f4c1da534fb4141f47e108b1b2bf1e7208f
--- /dev/null
+++ b/chrome/browser/page_load_metrics/observers/omnibox_suggestion_used_page_load_metrics_observer.cc
@@ -0,0 +1,122 @@
+// 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.
+
+#include "chrome/browser/page_load_metrics/observers/omnibox_suggestion_used_page_load_metrics_observer.h"
+
+#include <algorithm>
+
+#include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
+
+namespace {
+
+const char kSearchFirstContentfulPaint[] =
+    "Omnibox.SuggestionUsed.Search.NavigationToFirstContentfulPaint";
+const char kURLFirstContentfulPaint[] =
+    "Omnibox.SuggestionUsed.URL.NavigationToFirstContentfulPaint";
+const char kPrerenderSearchFirstContentfulPaint[] =
+    "Omnibox.SuggestionUsed.Search.ForegroundToFirstContentfulPaint.Prerender";
+const char kPrerenderURLFirstContentfulPaint[] =
+    "Omnibox.SuggestionUsed.URL.ForegroundToFirstContentfulPaint.Prerender";
+
+const char kSearchFirstMeaningfulPaint[] =
+    "Omnibox.SuggestionUsed.Search.Experimental."
+    "NavigationToFirstMeaningfulPaint";
+const char kURLFirstMeaningfulPaint[] =
+    "Omnibox.SuggestionUsed.URL.Experimental.NavigationToFirstMeaningfulPaint";
+const char kPrerenderSearchFirstMeaningfulPaint[] =
+    "Omnibox.SuggestionUsed.Search.Experimental."
+    "ForegroundToFirstMeaningfulPaint.Prerender";
+const char kPrerenderURLFirstMeaningfulPaint[] =
+    "Omnibox.SuggestionUsed.URL.Experimental."
+    "ForegroundToFirstMeaningfulPaint.Prerender";
+
+const char kPrerenderSearchNavigationToFirstForeground[] =
+    "Omnibox.SuggestionUsed.Search.NavigationToFirstForeground.Prerender";
+const char kPrerenderURLNavigationToFirstForeground[] =
+    "Omnibox.SuggestionUsed.URL.NavigationToFirstForeground.Prerender";
+
+}  // namespace
+
+OmniboxSuggestionUsedMetricsObserver::OmniboxSuggestionUsedMetricsObserver(
+    bool is_prerender)
+    : is_prerender_(is_prerender) {}
+
+OmniboxSuggestionUsedMetricsObserver::~OmniboxSuggestionUsedMetricsObserver() {}
+
+page_load_metrics::PageLoadMetricsObserver::ObservePolicy
+OmniboxSuggestionUsedMetricsObserver::OnHidden(
+    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::PageLoadExtraInfo& info) {
+  return STOP_OBSERVING;
+}
+
+page_load_metrics::PageLoadMetricsObserver::ObservePolicy
+OmniboxSuggestionUsedMetricsObserver::OnCommit(
+    content::NavigationHandle* navigation_handle) {
+  transition_type_ = navigation_handle->GetPageTransition();
+  return (transition_type_ & ui::PAGE_TRANSITION_FROM_ADDRESS_BAR) != 0
+             ? CONTINUE_OBSERVING
+             : STOP_OBSERVING;
+}
+
+void OmniboxSuggestionUsedMetricsObserver::OnFirstContentfulPaint(
+    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::PageLoadExtraInfo& info) {
+  base::TimeDelta fcp = timing.first_contentful_paint.value();
+
+  if (info.started_in_foreground) {
+    if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                     ui::PAGE_TRANSITION_GENERATED)) {
+      PAGE_LOAD_HISTOGRAM(kSearchFirstContentfulPaint, fcp);
+    } else if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                            ui::PAGE_TRANSITION_TYPED)) {
+      PAGE_LOAD_HISTOGRAM(kURLFirstContentfulPaint, fcp);
+    }
+    return;
+  }
+  // Since a page is not supposed to paint in the background,
+  // when this function gets called, first_foreground_time should be set.
+  // We add this check just to be safe.
+  if (is_prerender_ && info.first_foreground_time) {
+    base::TimeDelta perceived_fcp =
+        std::max(base::TimeDelta(), fcp - info.first_foreground_time.value());
+    if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                     ui::PAGE_TRANSITION_GENERATED)) {
+      PAGE_LOAD_HISTOGRAM(kPrerenderSearchFirstContentfulPaint, perceived_fcp);
+      PAGE_LOAD_HISTOGRAM(kPrerenderSearchNavigationToFirstForeground,
+                          info.first_foreground_time.value());
+    } else if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                            ui::PAGE_TRANSITION_TYPED)) {
+      PAGE_LOAD_HISTOGRAM(kPrerenderURLFirstContentfulPaint, perceived_fcp);
+      PAGE_LOAD_HISTOGRAM(kPrerenderURLNavigationToFirstForeground,
+                          info.first_foreground_time.value());
+    }
+  }
+}
+
+void OmniboxSuggestionUsedMetricsObserver::OnFirstMeaningfulPaint(
+    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::PageLoadExtraInfo& info) {
+  base::TimeDelta fmp = timing.first_meaningful_paint.value();
+
+  if (info.started_in_foreground) {
+    if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                     ui::PAGE_TRANSITION_GENERATED)) {
+      PAGE_LOAD_HISTOGRAM(kSearchFirstMeaningfulPaint, fmp);
+    } else if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                            ui::PAGE_TRANSITION_TYPED)) {
+      PAGE_LOAD_HISTOGRAM(kURLFirstMeaningfulPaint, fmp);
+    }
+  } else if (is_prerender_ && info.first_foreground_time) {
+    base::TimeDelta perceived_fmp =
+        std::max(base::TimeDelta(), fmp - info.first_foreground_time.value());
+    if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                     ui::PAGE_TRANSITION_GENERATED)) {
+      PAGE_LOAD_HISTOGRAM(kPrerenderSearchFirstMeaningfulPaint, perceived_fmp);
+    } else if (ui::PageTransitionCoreTypeIs(transition_type_,
+                                            ui::PAGE_TRANSITION_TYPED)) {
+      PAGE_LOAD_HISTOGRAM(kPrerenderURLFirstMeaningfulPaint, perceived_fmp);
+    }
+  }
+}