Remove screen capturers from media/video/capture/screen.

media/video/capture/screen/differ_block_sse2.h

Index: media/video/capture/screen/differ_block_sse2.h
diff --git a/media/video/capture/screen/differ_block_sse2.h b/media/video/capture/screen/differ_block_sse2.h
deleted file mode 100644
index 08d4d474600182fcb099ace6cf2c41f8d4a20c29..0000000000000000000000000000000000000000
--- a/media/video/capture/screen/differ_block_sse2.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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 header file is used only differ_block.h. It defines the SSE2 rountines
-// for finding block difference.
-
-#ifndef MEDIA_VIDEO_CAPTURE_SCREEN_DIFFER_BLOCK_SSE2_H_
-#define MEDIA_VIDEO_CAPTURE_SCREEN_DIFFER_BLOCK_SSE2_H_
-
-#include "base/basictypes.h"
-
-namespace media {
-
-// Find block difference of dimension 16x16.
-extern int BlockDifference_SSE2_W16(const uint8* image1, const uint8* image2,
-                                    int stride);
-
-// Find block difference of dimension 32x32.
-extern int BlockDifference_SSE2_W32(const uint8* image1, const uint8* image2,
-                                    int stride);
-
-}  // namespace media
-
-#endif  // MEDIA_VIDEO_CAPTURE_SCREEN_DIFFER_BLOCK_SSE2_H_