Add callback in VideoDecoder and AudioDecoder to return decoded frames.

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 c8548b5e1ff42f8d9013fbeb757b7d5292d92116..e592d52e8b53eb128ec05078496174ef305f3d0c 100644
--- a/media/base/mock_filters.h
+++ b/media/base/mock_filters.h
@@ -76,9 +76,10 @@ class MockVideoDecoder : public VideoDecoder {
   virtual ~MockVideoDecoder();
 
   // VideoDecoder implementation.
-  MOCK_METHOD3(Initialize, void(const VideoDecoderConfig& config,
+  MOCK_METHOD4(Initialize, void(const VideoDecoderConfig& config,
                                 bool low_delay,
-                                const PipelineStatusCB&));
+                                const PipelineStatusCB& status_cb,
+                                const OutputCB& output_cb));
   MOCK_METHOD2(Decode, void(const scoped_refptr<DecoderBuffer>& buffer,
                             const DecodeCB&));
   MOCK_METHOD1(Reset, void(const base::Closure&));
@@ -95,8 +96,10 @@ class MockAudioDecoder : public AudioDecoder {
   virtual ~MockAudioDecoder();
 
   // AudioDecoder implementation.
-  MOCK_METHOD2(Initialize, void(const AudioDecoderConfig& config,
-                                const PipelineStatusCB&));
+  MOCK_METHOD3(Initialize,
+               void(const AudioDecoderConfig& config,
+                    const PipelineStatusCB& status_cb,
+                    const OutputCB& output_cb));
   MOCK_METHOD2(Decode,
                void(const scoped_refptr<DecoderBuffer>& buffer,
                     const DecodeCB&));