Add OVERRIDE to media/.

media/webm/webm_cluster_parser.h

Index: media/webm/webm_cluster_parser.h
diff --git a/media/webm/webm_cluster_parser.h b/media/webm/webm_cluster_parser.h
index ee1caf870575a37798a4e689091afb48a5b0921f..5a367b0160bdd2d589faaca1d9ace1e894f75497 100644
--- a/media/webm/webm_cluster_parser.h
+++ b/media/webm/webm_cluster_parser.h
@@ -37,14 +37,14 @@ class WebMClusterParser : public WebMParserClient {
 
  private:
   // WebMParserClient methods.
-  virtual bool OnListStart(int id);
-  virtual bool OnListEnd(int id);
-  virtual bool OnUInt(int id, int64 val);
-  virtual bool OnFloat(int id, double val);
-  virtual bool OnBinary(int id, const uint8* data, int size);
-  virtual bool OnString(int id, const std::string& str);
+  virtual bool OnListStart(int id) OVERRIDE;
+  virtual bool OnListEnd(int id) OVERRIDE;
+  virtual bool OnUInt(int id, int64 val) OVERRIDE;
+  virtual bool OnFloat(int id, double val) OVERRIDE;
+  virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE;
+  virtual bool OnString(int id, const std::string& str) OVERRIDE;
   virtual bool OnSimpleBlock(int track_num, int timecode, int flags,
-                             const uint8* data, int size);
+                             const uint8* data, int size) OVERRIDE;
 
   double timecode_multiplier_;  // Multiplier used to convert timecodes into
                                 // microseconds.