Make MediaInternals handle MediaLogEvents.

chrome/browser/media/media_internals.h

Index: chrome/browser/media/media_internals.h
diff --git a/chrome/browser/media/media_internals.h b/chrome/browser/media/media_internals.h
index a5b62e108438b5f6b777d5dc1519f34a7bc8ce45..22552579ae4ba5affe3e9301c5686494b036e3c9 100644
--- a/chrome/browser/media/media_internals.h
+++ b/chrome/browser/media/media_internals.h
@@ -57,8 +57,13 @@ class MediaInternals : public MediaObserver, public base::NonThreadSafe {
 
   // Sets data_.id.property = value and notifies attached UIs using update_fn.
   // id may be any depth, e.g. "video.decoders.1.2.3"
-  void UpdateItem(const std::string& update_fn, const std::string& id,
-                  const std::string& property, Value* value);
+  void SetItemProperty(const std::string& update_fn, const std::string& id,
+                       const std::string& property, Value* value);
+
+  // Merges |properties| into data_.id and notifies attached UIs using
+  // update_fn. Takes ownership of |properties|.
+  void SetItemProperties(const std::string& update_fn, const std::string& id,
+                         DictionaryValue* properties);
 
   // Calls javascript |function|(|value|) on each attached UI.
   void SendUpdate(const std::string& function, Value* value);