cc: Split Proxy to eliminate unnecessary dependencies on the impl side

cc/layers/layer_unittest.cc

Index: cc/layers/layer_unittest.cc
diff --git a/cc/layers/layer_unittest.cc b/cc/layers/layer_unittest.cc
index 6f81e8e84836fc6a1225fa89229038d772660077..d81463d3293917e9229388e83b07dd570d317ff6 100644
--- a/cc/layers/layer_unittest.cc
+++ b/cc/layers/layer_unittest.cc
@@ -11,7 +11,7 @@
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/test/animation_test_common.h"
-#include "cc/test/fake_impl_proxy.h"
+#include "cc/test/fake_impl_task_runner_provider.h"
 #include "cc/test/fake_layer_tree_host_client.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/geometry_test_utils.h"
@@ -58,7 +58,9 @@ class MockLayerTreeHost : public LayerTreeHost {
 class LayerTest : public testing::Test {
  public:
   LayerTest()
-      : host_impl_(&proxy_, &shared_bitmap_manager_, &task_graph_runner_),
+      : host_impl_(&task_runner_provider_,
+                   &shared_bitmap_manager_,
+                   &task_graph_runner_),
         fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {}
 
  protected:
@@ -133,7 +135,7 @@ class LayerTest : public testing::Test {
     VerifyTestTreeInitialState();
   }
 
-  FakeImplProxy proxy_;
+  FakeImplTaskRunnerProvider task_runner_provider_;
   TestSharedBitmapManager shared_bitmap_manager_;
   TestTaskGraphRunner task_graph_runner_;
   FakeLayerTreeHostImpl host_impl_;