Move Pipeline permanent callbacks into Pipeline::Client interface.

media/test/pipeline_integration_test_base.h

Index: media/test/pipeline_integration_test_base.h
diff --git a/media/test/pipeline_integration_test_base.h b/media/test/pipeline_integration_test_base.h
index 82304897309b18d6eb7a710357793f0e3cefdebb..d67bb269f41869f8a74d84737a848d8a4f54a300 100644
--- a/media/test/pipeline_integration_test_base.h
+++ b/media/test/pipeline_integration_test_base.h
@@ -15,6 +15,7 @@
 #include "media/base/demuxer.h"
 #include "media/base/media_keys.h"
 #include "media/base/null_video_sink.h"
+#include "media/base/pipeline_client.h"
 #include "media/base/pipeline_impl.h"
 #include "media/base/pipeline_status.h"
 #include "media/base/text_track.h"
@@ -58,7 +59,7 @@ class DummyTickClock : public base::TickClock {
 // display or audio device. Both of these devices are simulated since they have
 // little effect on verifying pipeline behavior and allow tests to run faster
 // than real-time.
-class PipelineIntegrationTestBase {
+class PipelineIntegrationTestBase : public PipelineClient {
  public:
   PipelineIntegrationTestBase();
   virtual ~PipelineIntegrationTestBase();