Move Pipeline permanent callbacks into Pipeline::Client interface.

media/filters/pipeline_controller_unittest.cc

Index: media/filters/pipeline_controller_unittest.cc
diff --git a/media/filters/pipeline_controller_unittest.cc b/media/filters/pipeline_controller_unittest.cc
index eec11d8d7d46e87c29126801b727567e4bab80bd..42c4b0ece1539f57cc4a81ec8701cc374aea9325 100644
--- a/media/filters/pipeline_controller_unittest.cc
+++ b/media/filters/pipeline_controller_unittest.cc
@@ -12,6 +12,7 @@
 #include "base/time/time.h"
 #include "media/base/mock_filters.h"
 #include "media/base/pipeline.h"
+#include "media/base/pipeline_client.h"
 #include "media/filters/pipeline_controller.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -26,10 +27,11 @@ using ::testing::StrictMock;
 
 namespace media {
 
-class PipelineControllerTest : public ::testing::Test {
+class PipelineControllerTest : public ::testing::Test, public PipelineClient {
  public:
   PipelineControllerTest()
-      : pipeline_controller_(&pipeline_,
+      : pipeline_(this),
+        pipeline_controller_(&pipeline_,
                              base::Bind(&PipelineControllerTest::CreateRenderer,
                                         base::Unretained(this)),
                              base::Bind(&PipelineControllerTest::OnSeeked,