cc/blimp: Add synchronization for scroll/scale state.

blimp/client/test/compositor/blimp_compositor_with_fake_host.h

Index: blimp/client/test/compositor/blimp_compositor_with_fake_host.h
diff --git a/blimp/client/test/compositor/blimp_compositor_with_fake_host.h b/blimp/client/test/compositor/blimp_compositor_with_fake_host.h
new file mode 100644
index 0000000000000000000000000000000000000000..a95ae82797476bf0ec7901c3cda5064f89726c88
--- /dev/null
+++ b/blimp/client/test/compositor/blimp_compositor_with_fake_host.h
@@ -0,0 +1,50 @@
+// 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 BLIMP_CLIENT_TEST_COMPOSITOR_BLIMP_COMPOSITOR_WITH_FAKE_HOST_H_
+#define BLIMP_CLIENT_TEST_COMPOSITOR_BLIMP_COMPOSITOR_WITH_FAKE_HOST_H_
+
+#include "base/macros.h"
+#include "blimp/client/core/compositor/blimp_compositor.h"
+#include "cc/test/fake_layer_tree_host.h"
+#include "cc/test/fake_layer_tree_host_client.h"
+#include "cc/test/test_task_graph_runner.h"
+
+namespace cc {
+namespace proto {
+class CompositorMessage;
+}
+}
+
+namespace blimp {
+namespace client {
+
+class BlimpCompositorWithFakeHost : public BlimpCompositor {
+ public:
+  static std::unique_ptr<BlimpCompositorWithFakeHost> Create(
+      BlimpCompositorDependencies* compositor_dependencies,
+      BlimpCompositorClient* client);
+  ~BlimpCompositorWithFakeHost() override;
+
+  std::unique_ptr<cc::proto::CompositorMessage> CreateFakeUpdate(
+      scoped_refptr<cc::Layer> root_layer);
+  cc::FakeLayerTreeHost* host() { return fake_host_; }
+
+ protected:
+  BlimpCompositorWithFakeHost(
+      BlimpCompositorDependencies* compositor_dependencies,
+      BlimpCompositorClient* client);
+
+  std::unique_ptr<cc::LayerTreeHostInProcess> CreateLayerTreeHost() override;
+
+ private:
+  cc::FakeLayerTreeHostClient fake_client_;
+  cc::TestTaskGraphRunner task_graph_runner_;
+  cc::FakeLayerTreeHost* fake_host_ = nullptr;
+};
+
+}  // namespace client
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_TEST_COMPOSITOR_BLIMP_COMPOSITOR_WITH_FAKE_HOST_H_