Page Abort Events for relevant navigations

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index bf2dd23dba7c7ea3cddffb896bdcc83600b76347..f246913456e5acba76e459bda23f0374ff55c760 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -29884,6 +29884,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 <histogram name="PageLoad.EventCounts" enum="PageLoadEvent">
   <owner>csharrison@chromium.org</owner>
   <owner>bmcquade@chromium.org</owner>
+  <obsolete>
+    deprecated in favor of PageLoad.Events.*
+  </obsolete>
   <summary>
     Captures counts of various page load events. These are enumerated in the
     enum page_load_metrics::PageLoadEvent, and include events like 'page load
@@ -29891,6 +29894,26 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PageLoad.Events.Committed" enum="CommittedLoadEvent">
+  <owner>csharrison@chromium.org</owner>
+  <owner>bmcquade@chromium.org</owner>
+  <summary>
+    Captures counts of load events post-commit, on relevant page loads (i.e.
+    http/https, not same-page, not an error page). These events include counts
+    aborts before first layout, successful first layouts, and loads starting in
+    background or foreground.
+  </summary>
+</histogram>
+
+<histogram name="PageLoad.Events.Provisional" enum="ProvisionalLoadEvent">
+  <owner>csharrison@chromium.org</owner>
+  <owner>bmcquade@chromium.org</owner>
+  <summary>
+    Captures counts of provisional load events. These include aborted, failed,
+    and successful (committed) provisional loads.
+  </summary>
+</histogram>
+
 <histogram name="PageLoad.Timing.NavigationToDOMContentLoadedEventFired"
     units="milliseconds">
   <owner>bmcquade@chromium.org</owner>
@@ -29939,6 +29962,28 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PageLoad.Timing2.NavigationToFirstBackground"
+    units="milliseconds">
+  <owner>bmcquade@chromium.org</owner>
+  <owner>csharrison@chromium.org</owner>
+  <summary>
+    Measures the time from navigation timing's navigation start to the time the
+    user first backgrounds the tab. Only measures navigations that started in
+    the foreground.
+  </summary>
+</histogram>
+
+<histogram name="PageLoad.Timing2.NavigationToFirstForeground"
+    units="milliseconds">
+  <owner>bmcquade@chromium.org</owner>
+  <owner>csharrison@chromium.org</owner>
+  <summary>
+    Measures the time from navigation timing's navigation start to the time the
+    user first foregrounds an initially backgrounded tab. Only measures
+    navigations that started in the background.
+  </summary>
+</histogram>
+
 <histogram name="PageLoad.Timing2.NavigationToFirstLayout" units="milliseconds">
   <owner>bmcquade@chromium.org</owner>
   <owner>csharrison@chromium.org</owner>
@@ -53991,6 +54036,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="505" label="505: HTTP Version Not Supported"/>
 </enum>
 
+<enum name="CommittedLoadEvent" type="int">
+  <int value="0" label="Committed load aborted before first layout"/>
+  <int value="1" label="Successful first layout fully foregrounded"/>
+  <int value="2"
+      label="Successful first layout at least partially backgrounded"/>
+  <int value="3" label="Load started in foreground"/>
+  <int value="4" label="Load started in background"/>
+  <int value="5" label="Received a bad timing IPC"/>
+</enum>
+
 <enum name="CompositedScrolling" type="int">
   <int value="0" label="Is scrollable area"/>
   <int value="1" label="Needs to be stacking container"/>
@@ -66843,6 +66898,10 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="3" label="Aborted load before first layout"/>
   <int value="4" label="Successful first layout (foreground)"/>
   <int value="5" label="Successful first layout (backgrounded)"/>
+  <int value="6" label="Aborted load before first layout (relevant page load)"/>
+  <int value="7" label="Relevant page load started in foreground"/>
+  <int value="8" label="Relevant page load started in backgound"/>
+  <int value="9" label="Received a bad timing IPC"/>
 </enum>
 
 <enum name="PageScaleFactorRange" type="int">
@@ -68946,6 +69005,12 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="5" label="SPDY 4.0"/>
 </enum>
 
+<enum name="ProvisionalLoadEvent" type="int">
+  <int value="0" label="Provisional load aborted"/>
+  <int value="1" label="Provisional load failed with a non-abort"/>
+  <int value="2" label="Provisional load successfully committed"/>
+</enum>
+
 <enum name="ProvisionalSaveFailure" type="int">
   <int value="0" label="SAVING_DISABLED"/>
   <int value="1" label="EMPTY_PASSWORD"/>