cc: Plumbing for impl thread micro benchmarks

cc/debug/picture_record_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_PICTURE_RECORD_BENCHMARK_H_
 #define CC_DEBUG_PICTURE_RECORD_BENCHMARK_H_
 
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/time/time.h"
 #include "cc/debug/micro_benchmark_controller.h"
 
 namespace cc {
 
 class LayerTreeHost;
 class Layer;
-class PictureRecordBenchmark : public MicroBenchmark {
+class CC_EXPORT PictureRecordBenchmark : public MicroBenchmark {
  public:
   explicit PictureRecordBenchmark(scoped_ptr<base::Value> value,
                                   const MicroBenchmark::DoneCallback& callback);
   virtual ~PictureRecordBenchmark();
 
   // Implements MicroBenchmark interface.
   virtual void DidUpdateLayers(LayerTreeHost* host) OVERRIDE;
   virtual void RunOnLayer(PictureLayer* layer) OVERRIDE;
 
  private:
   void Run(Layer* layer);
 
   typedef std::pair<base::TimeDelta, unsigned> TotalTime;
   std::map<std::pair<int, int>, TotalTime> times_;
   std::vector<std::pair<int, int> > dimensions_;
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_PICTURE_RECORD_BENCHMARK_H_