Add OVERRIDE to media/.

media/filters/in_memory_url_protocol.h

Index: media/filters/in_memory_url_protocol.h
diff --git a/media/filters/in_memory_url_protocol.h b/media/filters/in_memory_url_protocol.h
index 1e6309aac2f4c085c7c6bd9c56fe7ea803728c90..d8fca033723f2195f5ff1f0380e8511e7e32a488 100644
--- a/media/filters/in_memory_url_protocol.h
+++ b/media/filters/in_memory_url_protocol.h
@@ -21,11 +21,11 @@ class MEDIA_EXPORT InMemoryUrlProtocol : public FFmpegURLProtocol {
   virtual ~InMemoryUrlProtocol();
 
   // FFmpegURLProtocol methods.
-  virtual size_t Read(size_t size, uint8* data);
-  virtual bool GetPosition(int64* position_out);
-  virtual bool SetPosition(int64 position);
-  virtual bool GetSize(int64* size_out);
-  virtual bool IsStreaming();
+  virtual size_t Read(size_t size, uint8* data) OVERRIDE;
+  virtual bool GetPosition(int64* position_out) OVERRIDE;
+  virtual bool SetPosition(int64 position) OVERRIDE;
+  virtual bool GetSize(int64* size_out) OVERRIDE;
+  virtual bool IsStreaming() OVERRIDE;
 
  private:
   const uint8* data_;