cc/blimp: Add a LayerTreeHostRemote implementation.

cc/test/fake_compositor_proto_state_sink.h

+// Copyright 2016 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_COMPOSITOR_PROTO_STATE_SINK_H_
+#define CC_TEST_FAKE_COMPOSITOR_PROTO_STATE_SINK_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "cc/blimp/compositor_proto_state_sink.h"
+
+namespace cc {
+
+// An implementation of the CompositorStateSink for tests that pumps
+// BeginMainFrames as soon as the client requests them.
+class FakeCompositorProtoStateSink : public CompositorProtoStateSink {
+ public:
+  FakeCompositorProtoStateSink();
+  ~FakeCompositorProtoStateSink() override;
+
+  // CompositorProtoStateSink implementation.
+  void BindToClient(CompositorProtoStateSinkClient* client) override;
+  void ScheduleMainFrame() override;
+  void ProcessCompositorStateUpdate(
+      std::unique_ptr<CompositorProtoState> compositor_proto_state) override {}
+
+ private:
+  void BeginMainFrame();
+
+  CompositorProtoStateSinkClient* client_;
+  base::WeakPtrFactory<FakeCompositorProtoStateSink> weak_factory_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_FAKE_COMPOSITOR_PROTO_STATE_SINK_H_