Update from https://crrev.com/307664

skia/ext/bitmap_platform_device_mac.cc

 // 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.
 
 #include "skia/ext/bitmap_platform_device_mac.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #include <time.h>
 
 #include "base/mac/mac_util.h"
@@ skipping 182 matching lines @@
   LoadConfig();
   return bitmap_context_;
 }
 
 void BitmapPlatformDevice::setMatrixClip(const SkMatrix& transform,
                                          const SkRegion& region,
                                          const SkClipStack&) {
   SetMatrixClip(transform, region);
 }
 
-void BitmapPlatformDevice::DrawToNativeContext(CGContextRef context, int x,
-                                               int y, const CGRect* src_rect) {
-  bool created_dc = false;
-  if (!bitmap_context_) {
-    created_dc = true;
-    GetBitmapContext();
-  }
-
-  // this should not make a copy of the bits, since we're not doing
-  // anything to trigger copy on write
-  CGImageRef image = CGBitmapContextCreateImage(bitmap_context_);
-  CGRect bounds;
-  bounds.origin.x = x;
-  bounds.origin.y = y;
-  if (src_rect) {
-    bounds.size.width = src_rect->size.width;
-    bounds.size.height = src_rect->size.height;
-    CGImageRef sub_image = CGImageCreateWithImageInRect(image, *src_rect);
-    CGContextDrawImage(context, bounds, sub_image);
-    CGImageRelease(sub_image);
-  } else {
-    bounds.size.width = width();
-    bounds.size.height = height();
-    CGContextDrawImage(context, bounds, image);
-  }
-  CGImageRelease(image);
-
-  if (created_dc)
-    ReleaseBitmapContext();
-}
-
 SkBaseDevice* BitmapPlatformDevice::onCreateCompatibleDevice(
                                                      const CreateInfo& cinfo) {
   const SkImageInfo& info = cinfo.fInfo;
   const bool do_clear = !info.isOpaque();
   SkASSERT(info.colorType() == kN32_SkColorType);
   return Create(NULL, info.width(), info.height(), info.isOpaque(), do_clear);
 }
 
 // PlatformCanvas impl
 
@@ skipping 28 matching lines @@
 
   if (!is_opaque)
     bitmap_.eraseColor(0);
 
   surface_ = CGContextForData(bitmap_.getPixels(), bitmap_.width(),
                               bitmap_.height());
   return true;
 }
 
 }  // namespace skia