Removed some unused variables in Windows code.

webrtc/modules/desktop_capture/win/cursor.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 32 matching lines @@
 #endif  // !defined(WEBRTC_ARCH_LITTLE_ENDIAN)
 
 const int kBytesPerPixel = DesktopFrame::kBytesPerPixel;
 
 // Pixel colors used when generating cursor outlines.
 const uint32_t kPixelRgbaBlack = RGBA(0, 0, 0, 0xff);
 const uint32_t kPixelRgbaWhite = RGBA(0xff, 0xff, 0xff, 0xff);
 const uint32_t kPixelRgbaTransparent = RGBA(0, 0, 0, 0);
 
 const uint32_t kPixelRgbWhite = RGB(0xff, 0xff, 0xff);
-const uint32_t kPixelRgbBlack = RGB(0, 0, 0);
 
 // Expands the cursor shape to add a white outline for visibility against
 // dark backgrounds.
 void AddCursorOutline(int width, int height, uint32_t* data) {
   for (int y = 0; y < height; y++) {
     for (int x = 0; x < width; x++) {
       // If this is a transparent pixel (bgr == 0 and alpha = 0), check the
       // neighbor pixels to see if this should be changed to an outline pixel.
       if (*data == kPixelRgbaTransparent) {
         // Change to white pixel if any neighbors (top, bottom, left, right)
@@ skipping 176 matching lines @@
 
   // Pre-multiply the resulting pixels since MouseCursor uses premultiplied
   // images.
   AlphaMul(reinterpret_cast<uint32_t*>(image->data()), width, height);
 
   return new MouseCursor(
       image.release(), DesktopVector(hotspot_x, hotspot_y));
 }
 
 }  // namespace webrtc