cc: Break up with FakeLayerTreeHostClient.

cc/layers/ui_resource_layer_unittest.cc

Index: cc/layers/ui_resource_layer_unittest.cc
diff --git a/cc/layers/ui_resource_layer_unittest.cc b/cc/layers/ui_resource_layer_unittest.cc
index 44897a53c14ba6dc561570b910bf9097e15c6ace..62906af1076743d861b6eb25cedb81cfcc6412a0 100644
--- a/cc/layers/ui_resource_layer_unittest.cc
+++ b/cc/layers/ui_resource_layer_unittest.cc
@@ -12,6 +12,7 @@
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_output_surface_client.h"
 #include "cc/test/geometry_test_utils.h"
+#include "cc/test/stub_layer_tree_host_single_thread_client.h"
 #include "cc/test/test_task_graph_runner.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/single_thread_proxy.h"
@@ -50,7 +51,7 @@ class UIResourceLayerTest : public testing::Test {
     layer_tree_host_ =
         FakeLayerTreeHost::Create(&fake_client_, &task_graph_runner_);
     layer_tree_host_->InitializeSingleThreaded(
-        &fake_client_, base::ThreadTaskRunnerHandle::Get(), nullptr);
+        &single_thread_client_, base::ThreadTaskRunnerHandle::Get(), nullptr);
   }
 
   void TearDown() override {
@@ -58,6 +59,7 @@ class UIResourceLayerTest : public testing::Test {
   }
 
   FakeLayerTreeHostClient fake_client_;
+  StubLayerTreeHostSingleThreadClient single_thread_client_;
   TestTaskGraphRunner task_graph_runner_;
   std::unique_ptr<FakeLayerTreeHost> layer_tree_host_;
 };