Introduce some buffering into the cast media pipeline.

chromecast/media/cma/base/mock_frame_provider.h

Index: chromecast/media/cma/base/mock_frame_provider.h
diff --git a/chromecast/media/cma/base/mock_frame_provider.h b/chromecast/media/cma/base/mock_frame_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..fbea1cf61e8e2d327800c97521e9ebe031db8b2d
--- /dev/null
+++ b/chromecast/media/cma/base/mock_frame_provider.h
@@ -0,0 +1,49 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMECAST_MEDIA_CMA_BASE_MOCK_FRAME_PROVIDER_H_
+#define CHROMECAST_MEDIA_CMA_BASE_MOCK_FRAME_PROVIDER_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "chromecast/media/cma/base/coded_frame_provider.h"
+
+namespace chromecast {
+namespace media {
+class FrameGeneratorForTest;
+
+class MockFrameProvider : public CodedFrameProvider {
+ public:
+  MockFrameProvider();
+  virtual ~MockFrameProvider();
+
+  void Configure(
+      const std::vector<bool>& delayed_task_pattern,
+      scoped_ptr<FrameGeneratorForTest> frame_generator);
+
+  // CodedFrameProvider implementation.
+  virtual void Read(const ReadCB& read_cb) OVERRIDE;
+  virtual void Flush(const base::Closure& flush_cb) OVERRIDE;
+
+ private:
+  void DoRead(const ReadCB& read_cb);
+
+  // Parameterization of the frame provider.
+  // |delayed_task_pattern_| indicates the pattern for delivering frames,
+  // i.e. after receiving a Read request, either delivers a frame right away
+  // or wait some time before delivering the frame.
+  // |pattern_idx_| is the current index in the pattern.
+  std::vector<bool> delayed_task_pattern_;
+  size_t pattern_idx_;
+
+  scoped_ptr<FrameGeneratorForTest> frame_generator_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockFrameProvider);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_MOCK_FRAME_PROVIDER_H_