CONTENT_EXPORT virtual void NativeAddReference() OVERRIDE;
CONTENT_EXPORT virtual void NativeReleaseReference() OVERRIDE;
CONTENT_EXPORT virtual bool IsNative() const OVERRIDE;
CONTENT_EXPORT virtual void NativeAddReference() OVERRIDE;
CONTENT_EXPORT virtual void NativeReleaseReference() OVERRIDE;
CONTENT_EXPORT virtual bool IsNative() const OVERRIDE;