Report WMPI components memory usage to UMA

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 2eb96e8a847bbd4e1f3fe7623592b299f184c27c..b9b91c7dc237689f0ea2853ce61b6f745eca1d88 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -25854,6 +25854,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.WebMediaPlayerImpl.Memory" units="KB">
+<!-- Name completed by histogram_suffixes name="MediaWMPIMemoryUsage" -->

[Ilya Sherman, 2016/12/15 01:30:54]

nit: Please omit this comment, and instead add base="true" on the line above.

[servolk, 2016/12/15 01:34:49]

Done. Thanks!

+
+  <owner>servolk@chromium.org</owner>
+  <summary>
+    Amount of memory used by the WebMediaPlayerImpl and its components.
+  </summary>
+</histogram>
+
 <histogram name="Media.WindowsCoreAudioInput" enum="BooleanSuccess">
   <owner>henrika@chromium.org</owner>
   <summary>
@@ -110408,6 +110417,14 @@ value.
   <affected-histogram name="Media.WatchTime"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="MediaWMPIMemoryUsage" separator=".">
+  <suffix name="Audio"/>
+  <suffix name="DataSource"/>
+  <suffix name="Demuxer"/>
+  <suffix name="Video"/>
+  <affected-histogram name="Media.WebMediaPlayerImpl.Memory"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="MemoryStateTransition" separator=".">
   <suffix name="NormalToThrottled"/>
   <suffix name="NormalToSuspended"/>