cc: Split Proxy and TaskRunnerProvider for the LayerTreeHost

cc/layers/layer_position_constraint_unittest.cc

Index: cc/layers/layer_position_constraint_unittest.cc
diff --git a/cc/layers/layer_position_constraint_unittest.cc b/cc/layers/layer_position_constraint_unittest.cc
index 594dac220a9667c2cf02747cceab8b9c772c422e..6e32bb4934609e639f68fdee4a5a7b605f1771a8 100644
--- a/cc/layers/layer_position_constraint_unittest.cc
+++ b/cc/layers/layer_position_constraint_unittest.cc
@@ -71,7 +71,9 @@ class LayerPositionConstraintTest : public testing::Test {
         child_impl_(nullptr),
         grand_child_impl_(nullptr),
         great_grand_child_impl_(nullptr) {
-    layer_tree_host_->InitializeForTesting(scoped_ptr<Proxy>(new FakeProxy));
+    layer_tree_host_->InitializeForTesting(
+        TaskRunnerProvider::Create(nullptr, nullptr),
+        scoped_ptr<Proxy>(new FakeProxy));
     CreateTreeForTest();
     fixed_to_top_left_.set_is_fixed_position(true);
     fixed_to_bottom_right_.set_is_fixed_position(true);