cc: Get rid of non-delegated rendering in most cc unit tests.

cc/test/fake_layer_tree_host_client.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_LAYER_TREE_HOST_CLIENT_H_
 #define CC_TEST_FAKE_LAYER_TREE_HOST_CLIENT_H_
 
 #include <memory>
 
 #include "cc/input/input_handler.h"
 #include "cc/test/test_context_provider.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_host_single_thread_client.h"
 
 namespace cc {
 class OutputSurface;
 
 class FakeLayerTreeHostClient : public LayerTreeHostClient,
                                 public LayerTreeHostSingleThreadClient {
  public:
-  enum RendererOptions {
-    DIRECT_3D,
-    DIRECT_SOFTWARE,
-    DELEGATED_3D,
-    DELEGATED_SOFTWARE
-  };
-  explicit FakeLayerTreeHostClient(RendererOptions options);
+  FakeLayerTreeHostClient();
   ~FakeLayerTreeHostClient() override;
 
   // Caller responsible for unsetting this and maintaining the host's lifetime.
   void SetLayerTreeHost(LayerTreeHost* host) { host_ = host; }
 
   // LayerTreeHostClient implementation.
   void WillBeginMainFrame() override {}
   void DidBeginMainFrame() override {}
   void BeginMainFrame(const BeginFrameArgs& args) override {}
   void BeginMainFrameNotExpectedSoon() override {}
@@ skipping 10 matching lines @@
   void DidCommit() override {}
   void DidCommitAndDrawFrame() override {}
   void DidCompleteSwapBuffers() override {}
   void DidCompletePageScaleAnimation() override {}
 
   // LayerTreeHostSingleThreadClient implementation.
   void DidPostSwapBuffers() override {}
   void DidAbortSwapBuffers() override {}
 
  private:
-  bool use_software_rendering_;
-  bool use_delegating_renderer_;
-
-  LayerTreeHost* host_;
+  LayerTreeHost* host_ = nullptr;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_LAYER_TREE_HOST_CLIENT_H_