Add UMA metrics for ffmpeg color ranges.

media/base/video_frame.cc

Index: media/base/video_frame.cc
diff --git a/media/base/video_frame.cc b/media/base/video_frame.cc
index a372889cb55a9f3ff2dedacdaf023e054cf56bf6..84563ba754ef99ad3d587a398643b780a3f613a7 100644
--- a/media/base/video_frame.cc
+++ b/media/base/video_frame.cc
@@ -66,6 +66,8 @@ std::string VideoFrame::FormatToString(VideoFrame::Format format) {
 #endif
     case VideoFrame::YV12A:
       return "YV12A";
+    case VideoFrame::FORMAT_HISTOGRAM_MAX:
+      return "FORMAT_HISTOGRAM_MAX";
   }
   NOTREACHED() << "Invalid videoframe format provided: " << format;
   return "";
@@ -241,6 +243,7 @@ size_t VideoFrame::NumPlanes(Format format) {
       return 4;
     case VideoFrame::EMPTY:
     case VideoFrame::INVALID:
+    case VideoFrame::FORMAT_HISTOGRAM_MAX:
       break;
   }
   NOTREACHED() << "Unsupported video frame format: " << format;
@@ -280,6 +283,7 @@ size_t VideoFrame::AllocationSize(Format format, const gfx::Size& coded_size) {
 #if defined(GOOGLE_TV)
     case VideoFrame::HOLE:
 #endif
+    case VideoFrame::FORMAT_HISTOGRAM_MAX:
       break;
   }
   NOTREACHED() << "Unsupported video frame format: " << format;