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

cc/trees/proxy_impl_unittest.cc

 // Copyright 2015 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.
 
 #include "cc/test/fake_channel_impl.h"
 #include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/fake_layer_tree_host_client.h"
 #include "cc/test/proxy_impl_for_test.h"
 #include "cc/test/test_hooks.h"
 #include "cc/test/test_task_graph_runner.h"
@@ skipping 27 matching lines @@
           ProxyImplForTest::Create(this, &channel_impl_, layer_tree_host_.get(),
                                    task_runner_provider_, nullptr);
     }
   }
 
   TestTaskGraphRunner task_graph_runner_;
   LayerTreeSettings settings_;
   FakeLayerTreeHostClient host_client_;
   FakeChannelImpl channel_impl_;
   TaskRunnerProvider* task_runner_provider_;
-  scoped_ptr<ProxyImplForTest> proxy_impl_;
-  scoped_ptr<FakeLayerTreeHost> layer_tree_host_;
+  std::unique_ptr<ProxyImplForTest> proxy_impl_;
+  std::unique_ptr<FakeLayerTreeHost> layer_tree_host_;
 };
 
 // This is a regression test. See crbug/568120.
 TEST_F(ProxyImplTest, NonZeroSmoothnessPriorityExpiration) {
   Initialize(CompositorMode::THREADED);
   DebugScopedSetImplThread impl_thread(task_runner_provider_);
   EXPECT_FALSE(
       proxy_impl_->smoothness_priority_expiration_notifier().delay().is_zero());
 }
 
 }  // namespace cc