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 a2dccecc890c292e22997b9ce54da6d2f1939f08..e1c9ffd2960b1c74f9dae3f6d37074cc61d834ff 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
@@ -424,7 +424,7 @@ 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;
@@ -441,7 +441,7 @@ class CORE_EXPORT HTMLMediaElement
   void waitForSourceChange();
   void setIgnorePreloadNone();
 
-  KURL selectNextSourceChild(ContentType*, InvalidURLAction);
+  KURL selectNextSourceChild(String*, InvalidURLAction);
 
   void mediaLoadingFailed(WebMediaPlayer::NetworkState);