Move screen capturers to remoting/capturer.

remoting/capturer/differ.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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 REMOTING_HOST_DIFFER_H_
-#define REMOTING_HOST_DIFFER_H_
+#ifndef REMOTING_CAPTURER_DIFFER_H_
+#define REMOTING_CAPTURER_DIFFER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkRegion.h"
 
 namespace remoting {
 
 typedef uint8 DiffInfo;
 
 // TODO: Simplify differ now that we are working with SkRegions.
 // diff_info_ should no longer be needed, as we can put our data directly into
 // the region that we are calculating.
 // http://crbug.com/92379
+// TODO(sergeyu): Rename this class to something more sensible, e.g.
+// VideoFrameDifferencer.
 class Differ {
  public:
   // Create a differ that operates on bitmaps with the specified width, height
   // and bytes_per_pixel.
   Differ(int width, int height, int bytes_per_pixel, int stride);
   ~Differ();
 
   int width() { return width_; }
   int height() { return height_; }
   int bytes_per_pixel() { return bytes_per_pixel_; }
@@ skipping 40 matching lines @@
   // Dimensions and total size of diff info array.
   int diff_info_width_;
   int diff_info_height_;
   int diff_info_size_;
 
   DISALLOW_COPY_AND_ASSIGN(Differ);
 };
 
 }  // namespace remoting
 
-#endif  // REMOTING_HOST_DIFFER_H_
+#endif  // REMOTING_CAPTURER_DIFFER_H_