cc: Plumbing for impl thread micro benchmarks

cc/debug/unittest_only_benchmark_impl.cc

+// 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.
+
+#include "cc/debug/unittest_only_benchmark_impl.h"
+
+#include "base/message_loop/message_loop_proxy.h"
+#include "base/values.h"
+
+namespace cc {
+
+UnittestOnlyBenchmarkImpl::UnittestOnlyBenchmarkImpl(
+    scoped_refptr<base::MessageLoopProxy> origin_loop,
+    base::Value* settings,
+    const DoneCallback& callback)
+    : MicroBenchmarkImpl(callback, origin_loop) {}
+
+UnittestOnlyBenchmarkImpl::~UnittestOnlyBenchmarkImpl() {}
+
+void UnittestOnlyBenchmarkImpl::DidCompleteCommit(LayerTreeHostImpl* host) {
+  NotifyDone(scoped_ptr<base::Value>());
+}
+
+}  // namespace cc