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

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 fb1a1d0bd2d615446f53471e964310647397cb38..f60363826e8e2e6e60dcdf4530ad69bccec8aefe 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -11447,6 +11447,15 @@ 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>
@@ -37561,6 +37570,11 @@ 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"/>