Revert of media-internals: Simplify the code path for creating a media log entry

media/base/media_log.h

Index: media/base/media_log.h
diff --git a/media/base/media_log.h b/media/base/media_log.h
index 8b40b5d4e61ff9ccff2e78b4a041f7d8f5ca3f2c..0a982015117d865095fdf586c4149fb2da2b7725 100644
--- a/media/base/media_log.h
+++ b/media/base/media_log.h
@@ -60,9 +60,8 @@
       size_t width, size_t height);
   scoped_ptr<MediaLogEvent> CreateBufferedExtentsChangedEvent(
       int64 start, int64 current, int64 end);
-
-  // Report a log message at the specified log level.
-  void AddLogEvent(MediaLogLevel level, const std::string& message);
+  scoped_ptr<MediaLogEvent> CreateLogEvent(MediaLogLevel level,
+                                           const std::string& message);
 
   // Report a property change without an accompanying event.
   void SetStringProperty(const std::string& key, const std::string& value);