base/ header cleanup. Forward declaration instead of including.

media/tools/scaler_bench/scaler_bench.cc

 // Copyright (c) 2010 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.
 
 // This tool can be used to measure performace of video frame scaling
 // code. It times performance of the scaler with and without filtering.
 // It also measures performance of the Skia scaler for comparison.
 
 #include <iostream>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/scoped_vector.h"
+#include "base/string_util.h"
 #include "base/time.h"
 #include "media/base/video_frame.h"
 #include "media/base/yuv_convert.h"
 #include "skia/ext/platform_canvas.h"
 
 using base::TimeDelta;
 using base::TimeTicks;
 using media::VideoFrame;
 using std::vector;
 
@@ skipping 180 matching lines @@
             << BenchmarkFilter(media::FILTER_BILINEAR_V)
             << "ms/frame" << std::endl;
   std::cout << "Bilinear Horizontal: "
             << BenchmarkFilter(media::FILTER_BILINEAR_H)
             << "ms/frame" << std::endl;
   std::cout << "Bilinear: " << BenchmarkFilter(media::FILTER_BILINEAR)
             << "ms/frame" << std::endl;
 
   return 0;
 }