Add UMA metrics for ffmpeg color ranges.

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 85787bf4a2f36ad8a1f6fae45961c9ed54f53c96..a41e4c6d00caebd67966d4b82fb0957e47d876b9 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -6354,6 +6354,12 @@ other types of suffix sets.
   <summary>Coded width of HTML5 video.</summary>
 </histogram>
 
+<histogram name="Media.VideoColorRange" enum="FFmpegColorRanges">
+  <summary>
+    Pixel format color range of HTML5 video. Emitted on video load.
+  </summary>
+</histogram>
+
 <histogram name="Media.VideoVisibleAspectRatio">
   <summary>Visible aspect ratio of HTML5 video.</summary>
 </histogram>
@@ -23162,6 +23168,12 @@ other types of suffix sets.
   <int value="1950507339" label="TAK"/>
 </enum>
 
+<enum name="FFmpegColorRanges" type="int">
+  <int value="0" label="UNSPECIFIED"/>
+  <int value="1" label="MPEG"/>
+  <int value="2" label="JPEG"/>
+</enum>
+
 <enum name="FileDialogType" type="int">
   <int value="0" label="Select folder"/>
   <int value="1" label="Save as file"/>