First fix to minimize copying of image data.

base/ref_counted.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 BASE_REF_COUNTED_H_
 #define BASE_REF_COUNTED_H_
 
 #include "base/atomic_ref_count.h"
 #include "base/thread_collision_warner.h"
 
@@ skipping 44 matching lines @@
 
  private:
   AtomicRefCount ref_count_;
 #ifndef NDEBUG
   bool in_dtor_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RefCountedThreadSafeBase);
 };
 
-
-
 }  // namespace subtle
 
 //
 // A base class for reference counted classes.  Otherwise, known as a cheap
 // knock-off of WebKit's RefCounted<T> class.  To use this guy just extend your
 // class from it like so:
 //
 //   class MyFoo : public base::RefCounted<MyFoo> {
 //    ...
 //   };
@@ skipping 166 matching lines @@
 
   void swap(scoped_refptr<T>& r) {
     swap(&r.ptr_);
   }
 
  protected:
   T* ptr_;
 };
 
 #endif  // BASE_REF_COUNTED_H_