cc: Make separate interface for BeginFrame ipc from OutputSurface

cc/test/layer_tree_test.cc

Index: cc/test/layer_tree_test.cc
diff --git a/cc/test/layer_tree_test.cc b/cc/test/layer_tree_test.cc
index 2c95269335b1f49d6b849122eed698191f14fdd0..1cecdb087d8d70dbab7ed2ebac6c03e3d154f437 100644
--- a/cc/test/layer_tree_test.cc
+++ b/cc/test/layer_tree_test.cc
@@ -54,9 +54,14 @@ class ThreadProxyForTest : public ThreadProxy {
       TestHooks* test_hooks,
       LayerTreeHost* host,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
+      scoped_ptr<ExternalBeginFrameSource> external_begin_frame_source) {
     return make_scoped_ptr(new ThreadProxyForTest(
-        test_hooks, host, main_task_runner, impl_task_runner));
+        test_hooks,
+        host,
+        main_task_runner,
+        impl_task_runner,
+        external_begin_frame_source.Pass()));
   }
 
   virtual ~ThreadProxyForTest() {}
@@ -99,8 +104,11 @@ class ThreadProxyForTest : public ThreadProxy {
       TestHooks* test_hooks,
       LayerTreeHost* host,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
-      : ThreadProxy(host, main_task_runner, impl_task_runner),
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
+      scoped_ptr<ExternalBeginFrameSource> external_begin_frame_source)
+      : ThreadProxy(host, main_task_runner,
+                    impl_task_runner,
+                    external_begin_frame_source.Pass()),
         test_hooks_(test_hooks) {}
 };
 
@@ -342,7 +350,8 @@ class LayerTreeHostForTesting : public LayerTreeHost {
       LayerTreeHostClientForTesting* client,
       const LayerTreeSettings& settings,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
+      scoped_ptr<ExternalBeginFrameSource> external_begin_frame_source) {
     scoped_ptr<LayerTreeHostForTesting> layer_tree_host(
         new LayerTreeHostForTesting(test_hooks, client, settings));
     if (impl_task_runner.get()) {
@@ -350,10 +359,14 @@ class LayerTreeHostForTesting : public LayerTreeHost {
           ThreadProxyForTest::Create(test_hooks,
                                      layer_tree_host.get(),
                                      main_task_runner,
-                                     impl_task_runner));
+                                     impl_task_runner,
+                                     external_begin_frame_source.Pass()));
     } else {
       layer_tree_host->InitializeForTesting(SingleThreadProxy::Create(
-          layer_tree_host.get(), client, main_task_runner));
+          layer_tree_host.get(),
+          client,
+          main_task_runner,
+          external_begin_frame_source.Pass()));
     }
     return layer_tree_host.Pass();
   }
@@ -522,7 +535,8 @@ void LayerTreeTest::DoBeginTest() {
       client_.get(),
       settings_,
       base::MessageLoopProxy::current(),
-      impl_thread_ ? impl_thread_->message_loop_proxy() : NULL);
+      impl_thread_ ? impl_thread_->message_loop_proxy() : NULL,
+      scoped_ptr<ExternalBeginFrameSource>());
   ASSERT_TRUE(layer_tree_host_);
 
   started_ = true;