cc: Plumbing for impl thread micro benchmarks

cc/debug/unittest_only_benchmark_impl.h

+// Copyright 2013 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_DEBUG_UNITTEST_ONLY_BENCHMARK_IMPL_H_
+#define CC_DEBUG_UNITTEST_ONLY_BENCHMARK_IMPL_H_
+
+#include "base/memory/weak_ptr.h"
+#include "cc/debug/micro_benchmark_impl.h"
+
+namespace base {
+class Value;
+class MessageLoopProxy;
+}
+
+namespace cc {
+
+class LayerTreeHostImpl;
+class CC_EXPORT UnittestOnlyBenchmarkImpl : public MicroBenchmarkImpl {
+ public:
+  UnittestOnlyBenchmarkImpl(scoped_refptr<base::MessageLoopProxy> origin_loop,
+                            base::Value* settings,
+                            const DoneCallback& callback);
+  virtual ~UnittestOnlyBenchmarkImpl();
+
+  virtual void DidCompleteCommit(LayerTreeHostImpl* host) OVERRIDE;
+};
+
+}  // namespace cc
+
+#endif  // CC_DEBUG_UNITTEST_ONLY_BENCHMARK_IMPL_H_