cc: Remove cc::Thread and cc::ThreadImpl.

cc/layers/tiled_layer_unittest.cc

Index: cc/layers/tiled_layer_unittest.cc
diff --git a/cc/layers/tiled_layer_unittest.cc b/cc/layers/tiled_layer_unittest.cc
index 325522611e173f48288c9d75ccc07ef3c4b28bce..2956d451b5d7c822d98da7d7543b89a2ff00b91c 100644
--- a/cc/layers/tiled_layer_unittest.cc
+++ b/cc/layers/tiled_layer_unittest.cc
@@ -57,7 +57,9 @@ class TiledLayerTest : public testing::Test {
 
   virtual void SetUp() {
     layer_tree_host_ = LayerTreeHost::Create(
-        &fake_layer_impl_tree_host_client_, settings_, scoped_ptr<Thread>());
+        &fake_layer_impl_tree_host_client_,
+        settings_,
+        scoped_refptr<base::SingleThreadTaskRunner>());
     proxy_ = layer_tree_host_->proxy();
     resource_manager_ = PrioritizedResourceManager::Create(proxy_);
     layer_tree_host_->InitializeOutputSurfaceIfNeeded();
@@ -97,7 +99,7 @@ class TiledLayerTest : public testing::Test {
     DCHECK(queue_);
     scoped_ptr<ResourceUpdateController> update_controller =
         ResourceUpdateController::Create(NULL,
-                                         proxy_->ImplThread()->TaskRunner(),
+                                         proxy_->ImplThreadTaskRunner(),
                                          queue_.Pass(),
                                          resource_provider_.get());
     update_controller->Finalize();