cc: Parameterize the main thread task runner

cc/layers/tiled_layer_unittest.cc

 // Copyright 2011 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/tiled_layer.h"
 
 #include <limits>
 #include <vector>
 
 #include "base/run_loop.h"
@@ skipping 65 matching lines @@
   }
 
  private:
   SynchronousOutputSurfaceLayerTreeHost(
       LayerTreeHostClient* client,
       SharedBitmapManager* manager,
       const LayerTreeSettings& settings,
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
       : LayerTreeHost(client, manager, settings),
         output_surface_created_(false) {
-    LayerTreeHost::InitializeThreaded(impl_task_runner);
+    LayerTreeHost::InitializeThreaded(base::MessageLoopProxy::current(),
+                                      impl_task_runner);
   }
 
   bool output_surface_created_;
   base::RunLoop run_loop_;
 };
 
 class TiledLayerTest : public testing::Test {
  public:
   TiledLayerTest()
       : proxy_(NULL),
@@ skipping 1713 matching lines @@
   // Invalidate the entire layer in layer space. When painting, the rect given
   // to webkit should match the layer's bounds.
   layer->SetNeedsDisplayRect(layer_rect);
   layer->Update(queue_.get(), NULL);
 
   EXPECT_RECT_EQ(layer_rect, layer->tracking_layer_painter()->PaintedRect());
 }
 
 }  // namespace
 }  // namespace cc