Add UMA logging to track bad MIME types passed to HTMLMediaElement

third_party/WebKit/Source/core/html/HTMLMediaElement.h

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.h b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
index 3d4b4c86ee81d18bde363883fbdb2364ab1a3b23..de0b89cdd0a16f13c24ba97e477f2bcf44cc60b2 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
@@ -428,7 +428,7 @@ class CORE_EXPORT HTMLMediaElement
   void invokeResourceSelectionAlgorithm();
   void loadInternal();
   void selectMediaResource();
-  void loadResource(const WebMediaPlayerSource&, const ContentType&);
+  void loadResource(const WebMediaPlayerSource&, const String& contentType);
   void startPlayerLoad(const KURL& playerProvidedUrl = KURL());
   void setPlayerPreload();
   WebMediaPlayer::LoadType loadType() const;
@@ -445,7 +445,7 @@ class CORE_EXPORT HTMLMediaElement
   void waitForSourceChange();
   void setIgnorePreloadNone();
 
-  KURL selectNextSourceChild(ContentType*, InvalidURLAction);
+  KURL selectNextSourceChild(String* contentType, InvalidURLAction);
 
   void mediaLoadingFailed(WebMediaPlayer::NetworkState);