Add UMA stats for received frames or not in video track adapter.

The adapter is torn down when a session is ended (no more tracks connected to it), so we do the logging in the destructor.

BUG=399835

Review URL: https://codereview.chromium.org/466333005

Cr-Commit-Position: refs/heads/master@{#289939}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289939 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/media/video_track_adapter.cc

@@ -11,6 +11,7 @@
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/location.h"
+#include "base/metrics/histogram.h"
 #include "media/base/video_util.h"
 
 namespace content {
@@ -315,6 +316,8 @@ VideoTrackAdapter::VideoTrackAdapter(
 
 VideoTrackAdapter::~VideoTrackAdapter() {
   DCHECK(adapters_.empty());
+  UMA_HISTOGRAM_BOOLEAN("Media.VideoTrackAdapter.FramesReceived",
+                        frame_counter_ > 0);
 }
 
 void VideoTrackAdapter::AddTrack(

tools/metrics/histograms/histograms.xml

@@ -11487,6 +11487,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>Metadata rotation in mp4 videos. Emitted during demuxing.</summary>
 </histogram>
 
+<histogram name="Media.VideoTrackAdapter.FramesReceived" enum="BooleanReceived">
+  <owner>grunell@chromium.org</owner>
+  <owner>mcasas@chromium.org</owner>
+  <summary>
+    If any frames were received during a video capture session. It's recorded
+    when a video source is stopped.
+  </summary>
+</histogram>
+
 <histogram name="Media.VideoVisibleAspectRatio">
   <owner>scherkus@chromium.org</owner>
   <summary>Visible aspect ratio of HTML5 video.</summary>
@@ -37673,6 +37682,11 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="1" label="Raced"/>
 </enum>
 
+<enum name="BooleanReceived" type="int">
+  <int value="0" label="Not Received"/>
+  <int value="1" label="Received"/>
+</enum>
+
 <enum name="BooleanRegistered" type="int">
   <int value="0" label="Not Registered"/>
   <int value="1" label="Registered"/>