cc: Add message passing mechanism to micro benchmarking.

cc/debug/micro_benchmark.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_MICRO_BENCHMARK_H_
 #define CC_DEBUG_MICRO_BENCHMARK_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 
 namespace base {
 class Value;
 class MessageLoopProxy;
 }  // namespace base
 
 namespace cc {
 
 class LayerTreeHost;
 class Layer;
 class PictureLayer;
 class MicroBenchmarkImpl;
 class CC_EXPORT MicroBenchmark {
  public:
   typedef base::Callback<void(scoped_ptr<base::Value>)> DoneCallback;
 
-  explicit MicroBenchmark(const DoneCallback& callback);
+  explicit MicroBenchmark(const DoneCallback& callback, int id);

[vmpstr, 2014/05/28 21:16:25]

Since this id isn't used by any particular benchmark, do you think it's better
to have a set_id(int id) that the controller calls at the end of the if/else
if/else if creation thing. That way each individual benchmark doesn't have to
take an id in the constructor.

[ernstm, 2014/05/28 21:51:55]

Done. The id is now set in ScheduleRun, after the benchmark was successfully
created.

   virtual ~MicroBenchmark();
 
   bool IsDone() const;
   virtual void DidUpdateLayers(LayerTreeHost* host);
+  int id() const { return id_; }
 
   virtual void RunOnLayer(Layer* layer);
   virtual void RunOnLayer(PictureLayer* layer);
 
+  virtual bool SendMessage(scoped_ptr<base::Value> value);
+
   bool ProcessedForBenchmarkImpl() const;
   scoped_ptr<MicroBenchmarkImpl> GetBenchmarkImpl(
       scoped_refptr<base::MessageLoopProxy> origin_loop);
 
  protected:
   void NotifyDone(scoped_ptr<base::Value> result);
 
   virtual scoped_ptr<MicroBenchmarkImpl> CreateBenchmarkImpl(
       scoped_refptr<base::MessageLoopProxy> origin_loop);
 
  private:
   DoneCallback callback_;
   bool is_done_;
   bool processed_for_benchmark_impl_;
+  int id_;
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_MICRO_BENCHMARK_H_