Fix media timeline so that thumb never exceeds buffered data

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 5f8a5d7e5c47ac2a723a7781b9f93b888e36ad7b..928dd50b5f413f81957665129a9bc491d5a44df4 100644
--- a/media/base/mock_filters.h
+++ b/media/base/mock_filters.h
@@ -238,9 +238,11 @@ class MockVideoRenderer : public VideoRenderer {
   MOCK_METHOD0(OnAudioRendererDisabled, void());
 
   // VideoRenderer implementation.
-  MOCK_METHOD3(Initialize, void(VideoDecoder* decoder,
-                                const base::Closure& callback,
-                                const StatisticsCallback& stats_callback));
+  MOCK_METHOD4(Initialize, void(VideoDecoder* decoder,
+                                const base::Closure& init_callback,
+                                const StatisticsCallback& stats_callback,
+                                const VideoTimeCB& time_cb));
+
   MOCK_METHOD0(HasEnded, bool());
 
   // TODO(scherkus): although VideoRendererBase defines this method, this really
@@ -265,9 +267,10 @@ class MockAudioRenderer : public AudioRenderer {
   MOCK_METHOD0(OnAudioRendererDisabled, void());
 
   // AudioRenderer implementation.
-  MOCK_METHOD3(Initialize, void(AudioDecoder* decoder,
+  MOCK_METHOD4(Initialize, void(AudioDecoder* decoder,
                                 const base::Closure& init_callback,
-                                const base::Closure& underflow_callback));
+                                const base::Closure& underflow_callback,
+                                const AudioTimeCB& time_cb));
   MOCK_METHOD0(HasEnded, bool());
   MOCK_METHOD1(SetVolume, void(float volume));
 
@@ -321,6 +324,8 @@ void RunFilterStatusCB(::testing::Unused, const FilterStatusCB& cb);
 void RunPipelineStatusCB(PipelineStatus status, const PipelineStatusCB& cb);
 void RunFilterCallback3(::testing::Unused, const base::Closure& callback,
                         ::testing::Unused);
+void RunFilterCallback4(::testing::Unused, const base::Closure& callback,
+                        ::testing::Unused, ::testing::Unused);
 
 // Helper gmock function that immediately executes the Closure on behalf of the
 // provided filter.  Can be used when mocking the Stop() method.