Instant Apps: Change the name of the metric.

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 3f50bd514b118765a101e057c440dfaf8d20a1a9..62c540657e8b5368ab6a2c2a4e4eb53b41ce0fd9 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -491,6 +491,30 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>The percentage of total storage downloads consume.</summary>
 </histogram>
 
+<histogram name="Android.InstantApps.ApiCallDuration2" units="ms">
+  <owner>mariakhomenko@chromium.org</owner>
+  <summary>
+    Measures the amount of time spent in the getInstantAppIntent() API call.
+  </summary>
+</histogram>
+
+<histogram name="Android.InstantApps.FallbackDuration" units="ms">
+  <owner>mariakhomenko@chromium.org</owner>
+  <summary>
+    Measures the time from when we first received an eligible intent for Instant
+    Apps to the time we processed it in the case where the  Instant Apps
+    activity had to invoke a fallback intent.
+  </summary>
+</histogram>
+
+<histogram name="Android.InstantApps.HandleIntentDuration" units="ms">
+  <owner>mariakhomenko@chromium.org</owner>
+  <summary>
+    Measures the amount of time spent triaging an incoming event to decide
+    whether it needs to be routed to Instant Apps.
+  </summary>
+</histogram>
+
 <histogram name="Android.IsLastSharedAppInfoRetrieved"
     enum="BooleanIsLastSharedAppInfoRetrieved">
   <owner>jaekyun@chromium.org</owner>