Prime the landing pad for the new video rendering pipeline.

This is not a functional change, it only updates the interfaces and
call sites in preparation for switching to a vsync based video
rendering pipeline.

Some notes:
- Plumbs a VideoRendererSink into the the rendering pipeline; similar to
how we have an AudioRendererSink.
- A couple VideoRendererSink mocks are introduced which will be short
lived. Like audio, we will need fakes which can pump consumption tasks.
- The "PaintCB" callback has been temporarily placed on the new sink
interface such that in the field experiments can be run comparing the
performance of the video rendering approaches.
- Finally nukes Player_X11 since setting up a vsync renderer just for
unused tool code isn't worth the effort.
- Since compositor callbacks may stop due to visibility changes, the
new VideoRendererImpl will use a countdown timer to pump video playback
as frames expire; expired frames will not count as dropped.
- Since canvas/WebGL requires frame updates in the background a new
method has been added to VideoFrameCompositor to return the current
frame if it was updated with 250ms, or to request a new one and return
the updated one.

Subsequent work:
- sunnyps@ will be switching VideoFrameProviderClientImpl over to using
a BeginFrameObserver, which will ultimately drive the Render() callbacks.
- dalecurtis@ will land the VideoRendererAlgorithm which powers the new
rendering pipeline.

BUG=439548
TEST=everything works as is.

Review URL: https://codereview.chromium.org/1053113002

Cr-Commit-Position: refs/heads/master@{#325306}

1 files changed, 15 insertions, 0 deletions

diff --git a/media/test/pipeline_integration_test_base.h b/media/test/pipeline_integration_test_base.h
index c8ca915..aa41337 100644
--- a/media/test/pipeline_integration_test_base.h
+++ b/media/test/pipeline_integration_test_base.h
@@ -45,6 +45,20 @@ class DummyTickClock : public base::TickClock {
   base::TimeTicks now_;
 };
 
+// TODO(dalecurtis): Mocks won't be useful for the new rendering path, we'll
+// need fake callback generators like we have for the audio path.
+// http://crbug.com/473424
+class MockVideoRendererSink : public VideoRendererSink {
+ public:
+  MockVideoRendererSink();
+  ~MockVideoRendererSink() override;
+
+  MOCK_METHOD1(Start, void(VideoRendererSink::RenderCallback*));
+  MOCK_METHOD0(Stop, void());
+  MOCK_METHOD1(PaintFrameUsingOldRenderingPath,
+               void(const scoped_refptr<VideoFrame>&));
+};
+
 // Integration tests for Pipeline. Real demuxers, real decoders, and
 // base renderer implementations are used to verify pipeline functionality. The
 // renderers used in these tests rely heavily on the AudioRendererBase &
@@ -105,6 +119,7 @@ class PipelineIntegrationTestBase {
   scoped_ptr<Pipeline> pipeline_;
   scoped_refptr<NullAudioSink> audio_sink_;
   scoped_refptr<ClocklessAudioSink> clockless_audio_sink_;
+  testing::NiceMock<MockVideoRendererSink> video_sink_;
   bool ended_;
   PipelineStatus pipeline_status_;
   Demuxer::EncryptedMediaInitDataCB encrypted_media_init_data_cb_;