cc: Split ThreadProxy into ProxyMain and ProxyImpl

cc/test/threaded_channel_for_test.h

Index: cc/test/threaded_channel_for_test.h
diff --git a/cc/test/threaded_channel_for_test.h b/cc/test/threaded_channel_for_test.h
new file mode 100644
index 0000000000000000000000000000000000000000..bd74790473218d80c92939e5fb22358035e3397d
--- /dev/null
+++ b/cc/test/threaded_channel_for_test.h
@@ -0,0 +1,38 @@
+// Copyright 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_TEST_THREADED_CHANNEL_FOR_TEST_H_
+#define CC_TEST_THREADED_CHANNEL_FOR_TEST_H_
+
+#include "base/macros.h"
+#include "cc/test/test_hooks.h"
+#include "cc/trees/threaded_channel.h"
+
+namespace cc {
+
+// ThreadedChannel that notifies |test_hooks| of internal actions by ProxyImpl.
+class ThreadedChannelForTest : public ThreadedChannel {
+ public:
+  static scoped_ptr<ThreadedChannel> Create(
+      TestHooks* test_hooks,
+      ProxyMain* proxy_main,
+      TaskRunnerProvider* task_runner_provider);
+
+ private:
+  ThreadedChannelForTest(TestHooks* test_hooks,
+                         ProxyMain* proxy_main,
+                         TaskRunnerProvider* task_runner_provider);
+
+  scoped_ptr<ProxyImpl> CreateProxyImpl(
+      ChannelImpl* channel_impl,
+      LayerTreeHost* layer_tree_host,
+      TaskRunnerProvider* task_runner_provider,
+      scoped_ptr<BeginFrameSource> external_begin_frame_source) override;
+
+  TestHooks* test_hooks_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_THREADED_CHANNEL_FOR_TEST_H_