SkBitmap and SkPixelRef no longer need lock/unlock

chrome/browser/media/webrtc/window_icon_util_mac.mm

 // Copyright 2016 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.
 
 #include "chrome/browser/media/webrtc/window_icon_util.h"
 
 #include <ApplicationServices/ApplicationServices.h>
 #include <Cocoa/Cocoa.h>
 #include <CoreFoundation/CoreFoundation.h>
 
@@ skipping 35 matching lines @@
   }
 
   CGDataProviderRef provider = CGImageGetDataProvider(cg_icon_image);
   CFDataRef cf_data = CGDataProviderCopyData(provider);
 
   int src_stride = CGImageGetBytesPerRow(cg_icon_image);
   const uint8_t* src_data = CFDataGetBytePtr(cf_data);
 
   SkBitmap result;
   result.allocN32Pixels(width, height, false);
-  result.lockPixels();
 
   uint8_t* pixels_data = reinterpret_cast<uint8_t*>(result.getPixels());
 
   libyuv::ABGRToARGB(src_data, src_stride, pixels_data, result.rowBytes(),
                      width, height);
 
   CFRelease(cf_data);
 
   return gfx::ImageSkia::CreateFrom1xBitmap(result);
 }