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

cc/test/layer_tree_json_parser_unittest.cc

Index: cc/test/layer_tree_json_parser_unittest.cc
diff --git a/cc/test/layer_tree_json_parser_unittest.cc b/cc/test/layer_tree_json_parser_unittest.cc
index 4f97945e253a6bc8538174ffb5af27cadc182c1a..7d63f498e572f5992e3016a198520d39fe7f00a2 100644
--- a/cc/test/layer_tree_json_parser_unittest.cc
+++ b/cc/test/layer_tree_json_parser_unittest.cc
@@ -5,7 +5,7 @@
 #include "cc/test/layer_tree_json_parser.h"
 
 #include "cc/layers/layer.h"
-#include "cc/test/fake_impl_proxy.h"
+#include "cc/test/fake_impl_task_runner_provider.h"
 #include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/geometry_test_utils.h"
@@ -63,10 +63,10 @@ class LayerTreeJsonParserSanityCheck : public testing::Test {
 };
 
 TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
-  FakeImplProxy proxy;
+  FakeImplTaskRunnerProvider task_runner_provider;
   TestSharedBitmapManager shared_bitmap_manager;
   TestTaskGraphRunner task_graph_runner;
-  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager,
+  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &shared_bitmap_manager,
                                   &task_graph_runner);
   LayerTreeImpl* tree = host_impl.active_tree();
 
@@ -94,10 +94,10 @@ TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
 }
 
 TEST_F(LayerTreeJsonParserSanityCheck, EventHandlerRegions) {
-  FakeImplProxy proxy;
+  FakeImplTaskRunnerProvider task_runner_provider;
   TestSharedBitmapManager shared_bitmap_manager;
   TestTaskGraphRunner task_graph_runner;
-  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager,
+  FakeLayerTreeHostImpl host_impl(&task_runner_provider, &shared_bitmap_manager,
                                   &task_graph_runner);
   LayerTreeImpl* tree = host_impl.active_tree();