cc: Split Proxy and TaskRunnerProvider for the LayerTreeHost

cc/test/fake_proxy.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_PROXY_H_
 #define CC_TEST_FAKE_PROXY_H_
 
 #include "base/single_thread_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/proxy.h"
 
 namespace cc {
 
 class FakeProxy : public Proxy {
  public:
-  FakeProxy() : Proxy(NULL, NULL), layer_tree_host_(NULL) {}
-  explicit FakeProxy(
-      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
-      : Proxy(main_task_runner, impl_task_runner), layer_tree_host_(NULL) {}
+  FakeProxy() : layer_tree_host_(nullptr) {}
 
   void SetLayerTreeHost(LayerTreeHost* host);
 
   void FinishAllRendering() override {}
   bool IsStarted() const override;
   bool CommitToActiveTree() const override;
   void SetOutputSurface(OutputSurface* output_surface) override {}
   void ReleaseOutputSurface() override;
   void SetVisible(bool visible) override {}
   void SetThrottleFrameProduction(bool throttle) override {}
@@ skipping 22 matching lines @@
   virtual RendererCapabilities& GetRendererCapabilities();
 
  private:
   RendererCapabilities capabilities_;
   LayerTreeHost* layer_tree_host_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PROXY_H_