Convert //cc from scoped_ptr to std::unique_ptr.

cc/test/fake_layer_tree_host.h

Index: cc/test/fake_layer_tree_host.h
diff --git a/cc/test/fake_layer_tree_host.h b/cc/test/fake_layer_tree_host.h
index 1218fb4836fd5180b1d1361cc5dbfc4dd5487f9a..0255078a5aaf69567115d1f2c420c5e6d6430fba 100644
--- a/cc/test/fake_layer_tree_host.h
+++ b/cc/test/fake_layer_tree_host.h
@@ -20,25 +20,25 @@ class TestTaskGraphRunner;
 
 class FakeLayerTreeHost : public LayerTreeHost {
  public:
-  static scoped_ptr<FakeLayerTreeHost> Create(
+  static std::unique_ptr<FakeLayerTreeHost> Create(
       FakeLayerTreeHostClient* client,
       TestTaskGraphRunner* task_graph_runner);
-  static scoped_ptr<FakeLayerTreeHost> Create(
+  static std::unique_ptr<FakeLayerTreeHost> Create(
       FakeLayerTreeHostClient* client,
       TestTaskGraphRunner* task_graph_runner,
       const LayerTreeSettings& settings);
-  static scoped_ptr<FakeLayerTreeHost> Create(
+  static std::unique_ptr<FakeLayerTreeHost> Create(
       FakeLayerTreeHostClient* client,
       TestTaskGraphRunner* task_graph_runner,
       const LayerTreeSettings& settings,
       CompositorMode mode);
-  static scoped_ptr<FakeLayerTreeHost> Create(
+  static std::unique_ptr<FakeLayerTreeHost> Create(
       FakeLayerTreeHostClient* client,
       TestTaskGraphRunner* task_graph_runner,
       const LayerTreeSettings& settings,
       CompositorMode mode,
       InitParams params);
-  static scoped_ptr<FakeLayerTreeHost> Create(
+  static std::unique_ptr<FakeLayerTreeHost> Create(
       FakeLayerTreeHostClient* client,
       TestTaskGraphRunner* task_graph_runner,
       const LayerTreeSettings& settings,