Update from https://crrev.com/307664

skia/ext/platform_canvas.cc

 // Copyright (c) 2011 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/platform_canvas.h"
 
 #include "skia/ext/bitmap_platform_device.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
 namespace skia {
@@ skipping 14 matching lines @@
 
   return 0;
 }
 
 void EndPlatformPaint(SkCanvas* canvas) {
   PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
   if (platform_device)
     platform_device->EndPlatformPaint();
 }
 
-void DrawToNativeContext(SkCanvas* canvas, PlatformSurface context, int x,
-                         int y, const PlatformRect* src_rect) {
-  PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
-  if (platform_device)
-    platform_device->DrawToNativeContext(context, x, y, src_rect);
-}
-
 void MakeOpaque(SkCanvas* canvas, int x, int y, int width, int height) {
   if (width <= 0 || height <= 0)
     return;
 
   SkRect rect;
   rect.setXYWH(SkIntToScalar(x), SkIntToScalar(y),
                SkIntToScalar(width), SkIntToScalar(height));
   SkPaint paint;
   paint.setColor(SK_ColorBLACK);
   paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
   canvas->drawRect(rect, paint);
 }
 
 size_t PlatformCanvasStrideForWidth(unsigned width) {
   return 4 * width;
 }
 
 SkCanvas* CreateCanvas(const skia::RefPtr<SkBaseDevice>& device, OnFailureType failureType) {
   if (!device) {
     if (CRASH_ON_FAILURE == failureType)
       SK_CRASH();
     return NULL;
   }
   return new SkCanvas(device.get());
 }
 
 PlatformBitmap::PlatformBitmap() : surface_(0), platform_extra_(0) {}
 
 }  // namespace skia