cc: Put context-loss tests in layer_tree_host_unittest_context.cc

cc/test/fake_video_frame_provider.h

+// Copyright 2012 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 CC_TEST_FAKE_VIDEO_FRAME_PROVIDER_H_
+#define CC_TEST_FAKE_VIDEO_FRAME_PROVIDER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/test/fake_video_frame.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebVideoFrameProvider.h"
+
+namespace cc {
+
+// Fake video frame provider that always provides the same VideoFrame.
+class FakeVideoFrameProvider: public WebKit::WebVideoFrameProvider {
+ public:
+  FakeVideoFrameProvider();
+  virtual ~FakeVideoFrameProvider();
+
+  virtual void setVideoFrameProviderClient(Client* client) OVERRIDE;
+  virtual WebKit::WebVideoFrame* getCurrentFrame() OVERRIDE;
+  virtual void putCurrentFrame(WebKit::WebVideoFrame*) OVERRIDE {}
+
+  void set_frame(FakeVideoFrame* frame) {
+    frame_ = frame;
+  }
+
+ private:
+  FakeVideoFrame* frame_;
+  Client* client_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_FAKE_VIDEO_FRAME_PROVIDER_H_