Add UMA to study the video types for mobile

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 9557f88eda48c9b0501c73e3e7069a7b0f223e62..a1c5ad944db9e73ce2151acdeca7309ffa7d846e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -11310,6 +11310,21 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Media.Mobile.IsHttpLiveStreamingMedia" enum="MediaUrlType">
+  <owner>qinmin@chromium.org</owner>
+  <summary>
+    Android: Records whether a regular media url is HLS (http live streaming)
+    media or not.
+  </summary>
+</histogram>
+
+<histogram name="Media.Mobile.MediaType" enum="MediaType">
+  <owner>qinmin@chromium.org</owner>
+  <summary>
+    Android: Records the type of the media content when it loads.
+  </summary>
+</histogram>
+
 <histogram name="Media.MSE.AudioCodec" enum="MSECodec">
   <owner>acolwell@chromium.org</owner>
   <summary>
@@ -44941,6 +44956,16 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="2" label="Pending Media Tracks"/>
 </enum>
 
+<enum name="MediaType" type="int">
+  <int value="0" label="MediaSourceType"/>
+  <int value="1" label="UrlType"/>
+</enum>
+
+<enum name="MediaUrlType" type="int">
+  <int value="0" label="File Type"/>

[Ilya Sherman, 2014/08/27 22:14:37]

Are you sure that non-HLS videos will always be of file type?  Since you're
currently logging these two histograms as boolean histograms, I would have
expected to see enums that each had labels along the lines of "foo" vs. "not
foo".

[qinmin, 2014/08/28 00:30:09]

Done.

+  <int value="1" label="Http Live Stream Type"/>
+</enum>
+
 <enum name="MetaTagTypeEnum" type="int">
   <int value="0" label="No viewport tag"/>
   <int value="1" label="Viewport meta with device width"/>