Update use of SkCanvas and SkDevice to match change in Skia

skia/ext/bitmap_platform_device_mac.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 #pragma once
 
 #include "skia/ext/platform_device_mac.h"
 
 namespace skia {
 
+class SkBitmapPlatformDeviceFactory : public SkRasterDeviceFactory {
+ public:
+  virtual SkDevice* newDevice(SkBitmap::Config config, int width, int height,
+                              bool isOpaque, bool isForLayer);
+};
+
+
 // A device is basically a wrapper around SkBitmap that provides a surface for
 // SkCanvas to draw into. Our device provides a surface CoreGraphics can also
 // write to. BitmapPlatformDevice creates a bitmap using
 // CGCreateBitmapContext() in a format that Skia supports and can then use this
 // to draw text into, etc. This pixel data is provided to the bitmap that the
 // device contains so that it can be shared.
 //
 // The device owns the pixel data, when the device goes away, the pixel data
 // also becomes invalid. THIS IS DIFFERENT THAN NORMAL SKIA which uses
 // reference counting for the pixel data. In normal Skia, you could assign
@@ skipping 20 matching lines @@
   //
   // This means it will NOT work to duplicate a device and assign it to a
   // canvas, because the two canvases will each set their own clip rects, and
   // the resulting CoreGraphics drawing state will be unpredictable.
   //
   // Copy constucting and "=" is designed for saving the device or passing it
   // around to another routine willing to deal with the bitmap data directly.
   BitmapPlatformDevice(const BitmapPlatformDevice& other);
   virtual ~BitmapPlatformDevice();
 
+  virtual SkDeviceFactory* getDeviceFactory() {
+    return SkNEW(SkBitmapPlatformDeviceFactory);
+  }
+
   // See warning for copy constructor above.
   BitmapPlatformDevice& operator=(const BitmapPlatformDevice& other);
 
   virtual CGContextRef GetBitmapContext();
   virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region);
 
   virtual void DrawToContext(CGContextRef context, int x, int y,
                              const CGRect* src_rect);
   virtual void makeOpaque(int x, int y, int width, int height);
   virtual bool IsVectorial() { return false; }
@@ skipping 17 matching lines @@
   virtual void onAccessBitmap(SkBitmap*);
 
   // Data associated with this device, guaranteed non-null. We hold a reference
   // to this object.
   BitmapPlatformDeviceData* data_;
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_