[Media, Video] Update WMPI when the pipeline gets a new average keyframe distance.

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 6e17ad01fd8b0870c7c8f1d4df6d9175c9e04cde..5620117c53d4faf63f8e87e66fd0384b705356ca 100644
--- a/media/test/pipeline_integration_test_base.h
+++ b/media/test/pipeline_integration_test_base.h
@@ -205,6 +205,7 @@ class PipelineIntegrationTestBase : public Pipeline::Client {
   MOCK_METHOD0(OnWaitingForDecryptionKey, void(void));
   MOCK_METHOD1(OnVideoNaturalSizeChange, void(const gfx::Size&));
   MOCK_METHOD1(OnVideoOpacityChange, void(bool));
+  MOCK_METHOD0(OnVideoAverageKeyframeDistanceUpdate, void());
 };
 
 }  // namespace media