cc: Parameterize the main thread task runner

cc/layers/ui_resource_layer_unittest.cc

 // Copyright 2013 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/layers/ui_resource_layer.h"
 
 #include "cc/resources/prioritized_resource_manager.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/resource_update_queue.h"
 #include "cc/resources/scoped_ui_resource.h"
@@ skipping 17 matching lines @@
 namespace cc {
 namespace {
 
 class UIResourceLayerTest : public testing::Test {
  public:
   UIResourceLayerTest() : fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {}
 
  protected:
   virtual void SetUp() {
     layer_tree_host_ = FakeLayerTreeHost::Create();
-    layer_tree_host_->InitializeSingleThreaded(&fake_client_);
+    layer_tree_host_->InitializeSingleThreaded(
+        &fake_client_, base::MessageLoopProxy::current());
   }
 
   virtual void TearDown() {
     Mock::VerifyAndClearExpectations(layer_tree_host_.get());
   }
 
   scoped_ptr<FakeLayerTreeHost> layer_tree_host_;
   FakeLayerTreeHostClient fake_client_;
 };
 
@@ skipping 47 matching lines @@
   scoped_ptr<ScopedUIResource> resource = ScopedUIResource::Create(
       layer_tree_host_.get(), UIResourceBitmap(gfx::Size(10, 10), is_opaque));
   test_layer->SetUIResourceId(resource->id());
   test_layer->Update(&queue, &occlusion_tracker);
 
   EXPECT_TRUE(test_layer->DrawsContent());
 }
 
 }  // namespace
 }  // namespace cc