Fold {Audio|Video}Decoder::Stop() into the dtor.

media/base/mock_filters.h

Index: media/base/mock_filters.h
diff --git a/media/base/mock_filters.h b/media/base/mock_filters.h
index 7afa62501678e7c2375a28fb0d33de80425b7be9..28d4d090b4db88cb93a609b3a7f368d397a2f40e 100644
--- a/media/base/mock_filters.h
+++ b/media/base/mock_filters.h
@@ -84,7 +84,6 @@ class MockVideoDecoder : public VideoDecoder {
   MOCK_METHOD2(Decode, void(const scoped_refptr<DecoderBuffer>& buffer,
                             const DecodeCB&));
   MOCK_METHOD1(Reset, void(const base::Closure&));
-  MOCK_METHOD0(Stop, void());
   MOCK_CONST_METHOD0(HasAlpha, bool());
 
  private:
@@ -105,7 +104,6 @@ class MockAudioDecoder : public AudioDecoder {
                void(const scoped_refptr<DecoderBuffer>& buffer,
                     const DecodeCB&));
   MOCK_METHOD1(Reset, void(const base::Closure&));
-  MOCK_METHOD0(Stop, void());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockAudioDecoder);