Standardize usage of virtual/override/final in 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 85aa1ed779becfec3d48a8dc0164fbee2c917dd1..02d09d4aa1e8321b155198476e5ff2b5fd052a10 100644
--- a/media/filters/in_memory_url_protocol.h
+++ b/media/filters/in_memory_url_protocol.h
@@ -22,11 +22,11 @@ class MEDIA_EXPORT InMemoryUrlProtocol : public FFmpegURLProtocol {
   virtual ~InMemoryUrlProtocol();
 
   // FFmpegURLProtocol methods.
-  virtual int Read(int 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;
+  int Read(int size, uint8* data) override;
+  bool GetPosition(int64* position_out) override;
+  bool SetPosition(int64 position) override;
+  bool GetSize(int64* size_out) override;
+  bool IsStreaming() override;
 
  private:
   const uint8* data_;