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 4a5c9eb7cee894bfa3697c236d4ee9efd62057ad..2621e9bc0cb49c02b268321ee3e3e44951060699 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -10900,6 +10900,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Media.Android.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.AudioBitsPerChannel">
   <owner>dalecurtis@chromium.org</owner>
   <summary>Bits per channel of HTML5 audio sample data.</summary>
@@ -45010,6 +45018,11 @@ 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="MediaUrlType" type="int">
+  <int value="0" label="Non Http Live Stream Type"/>
+  <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"/>