First fix to minimize copying of image data.

chrome/common/ref_counted_util.h

 // Copyright (c) 2006-2008 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 CHROME_COMMON_REF_COUNTED_UTIL_H__
 #define CHROME_COMMON_REF_COUNTED_UTIL_H__
 
 #include "base/ref_counted.h"
 #include <vector>
 
 // RefCountedVector is just a vector wrapped up with
 // RefCountedThreadSafe.
 template<class T>
 class RefCountedVector :
     public base::RefCountedThreadSafe<RefCountedVector<T> > {
  public:
   RefCountedVector() {}
   RefCountedVector(const std::vector<T>& initializer)
       : data(initializer) {}
 
   std::vector<T> data;
 
   DISALLOW_COPY_AND_ASSIGN(RefCountedVector<T>);
 };
 
-// RefCountedThreadSafeBytes represent a ref-counted blob of bytes.
-// Useful for passing data between threads without copying.
-typedef RefCountedVector<unsigned char> RefCountedBytes;
-
 #endif  // CHROME_COMMON_REF_COUNTED_UTIL_H__