cc: Parameterize the main thread task runner

cc/layers/layer_perftest.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/layer.h"
 
 #include "cc/debug/lap_timer.h"
 #include "cc/resources/layer_painter.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host.h"
@@ skipping 23 matching lines @@
   LayerPerfTest()
       : host_impl_(&proxy_, &shared_bitmap_manager_),
         fake_client_(FakeLayerTreeHostClient::DIRECT_3D),
         timer_(kWarmupRuns,
                base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
                kTimeCheckInterval) {}
 
  protected:
   virtual void SetUp() OVERRIDE {
     layer_tree_host_ = FakeLayerTreeHost::Create();
-    layer_tree_host_->InitializeSingleThreaded(&fake_client_);
+    layer_tree_host_->InitializeSingleThreaded(
+        &fake_client_, base::MessageLoopProxy::current());
   }
 
   virtual void TearDown() OVERRIDE {
     layer_tree_host_->SetRootLayer(NULL);
     layer_tree_host_.reset();
   }
 
   FakeImplProxy proxy_;
   TestSharedBitmapManager shared_bitmap_manager_;
   FakeLayerTreeHostImpl host_impl_;
@@ skipping 58 matching lines @@
                          "",
                          "props_didnt_change",
                          timer_.LapsPerSecond(),
                          "runs/s",
                          true);
 }
 
 
 }  // namespace
 }  // namespace cc