Added UMA logging for Video Rotation metadata.

BUG=47554

Review URL: https://codereview.chromium.org/394373002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283962 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/media/webmediaplayer_impl.cc

@@ -963,6 +963,9 @@ void WebMediaPlayerImpl::OnPipelineMetadata(
 
   pipeline_metadata_ = metadata;
 
+  UMA_HISTOGRAM_ENUMERATION("Media.VideoRotation",
+                            metadata.video_rotation,
+                            media::VIDEO_ROTATION_MAX + 1);
   SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
 
   if (hasVideo()) {

media/base/video_rotation.h

@@ -13,7 +13,8 @@ enum VideoRotation {
   VIDEO_ROTATION_0 = 0,
   VIDEO_ROTATION_90,
   VIDEO_ROTATION_180,
-  VIDEO_ROTATION_270
+  VIDEO_ROTATION_270,
+  VIDEO_ROTATION_MAX = VIDEO_ROTATION_270
 };
 
 }  // namespace media

tools/metrics/histograms/histograms.xml

@@ -10639,6 +10639,11 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>Pixel format used in HTML5 video. Emitted on video load.</summary>
 </histogram>
 
+<histogram name="Media.VideoRotation" enum="VideoRotation">
+  <owner>suderman@chromium.org</owner>
+  <summary>Metadata rotation in mp4 videos. Emitted during demuxing.</summary>
+</histogram>
+
 <histogram name="Media.VideoVisibleAspectRatio">
   <owner>scherkus@chromium.org</owner>
   <summary>Visible aspect ratio of HTML5 video.</summary>
@@ -47944,6 +47949,13 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="7" label="YV12J"/>
 </enum>
 
+<enum name="VideoRotation" type="int">
+  <int value="0" label="VIDEO_ROTATION_0"/>
+  <int value="1" label="VIDEO_ROTATION_90"/>
+  <int value="2" label="VIDEO_ROTATION_180"/>
+  <int value="3" label="VIDEO_ROTATION_270"/>
+</enum>
+
 <enum name="ViewFileType" type="int">
   <int value="0" label="other"/>
   <int value="1" label=".3ga"/>