Update use of SkCanvas and SkDevice to match change in Skia

skia/ext/bitmap_platform_device_linux.h

 // Copyright (c) 2009 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_LINUX_H_
 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_
 #pragma once
 
 #include "base/ref_counted.h"
 #include "skia/ext/platform_device_linux.h"
@@ skipping 25 matching lines @@
 // typically don't do alpha blending of drawables at the user level. Composite
 // extensions aside.)
 //
 // We don't use GdkPixbuf because its byte order differs from the rest. Most
 // importantly, it differs from Cairo which, being a system library, is
 // something that we can't easily change.
 // -----------------------------------------------------------------------------
 
 namespace skia {
 
+class SkBitmapPlatformDeviceFactory : public SkRasterDeviceFactory {
+ public:
+  virtual SkDevice* newDevice(SkBitmap::Config config, int width, int height,
+                              bool isOpaque, bool isForLayer);
+};
+
 // -----------------------------------------------------------------------------
 // This is the Linux bitmap backing for Skia. We create a Cairo image surface
 // to store the backing buffer. This buffer is BGRA in memory (on little-endian
 // machines).
 //
 // For now we are also using Cairo to paint to the Drawables so we provide an
 // accessor for getting the surface.
 //
 // This is all quite ok for test_shell. In the future we will want to use
 // shared memory between the renderer and the main process at least. In this
@@ skipping 16 matching lines @@
   // the Windows and Mac versions of this class do.
   //
   // This object takes ownership of @data.
   BitmapPlatformDevice(const SkBitmap& other, BitmapPlatformDeviceData* data);
   virtual ~BitmapPlatformDevice();
   BitmapPlatformDevice& operator=(const BitmapPlatformDevice& other);
 
   // A stub copy constructor.  Needs to be properly implemented.
   BitmapPlatformDevice(const BitmapPlatformDevice& other);
 
+  virtual SkDeviceFactory* getDeviceFactory() {
+    return SkNEW(SkBitmapPlatformDeviceFactory);
+  }
+
   virtual void makeOpaque(int x, int y, int width, int height);
 
   // Bitmaps aren't vector graphics.
   virtual bool IsVectorial() { return false; }
 
   // If someone wants to paint on a Cairo surface version of our
   // buffer, then give them the surface we're already using.
   virtual cairo_t* beginPlatformPaint();
 
   // Loads the given transform and clipping region into the HDC. This is
   // overridden from SkDevice.
   virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region);
 
  private:
   static BitmapPlatformDevice* Create(int width, int height, bool is_opaque,
                                       cairo_surface_t* surface);
 
   scoped_refptr<BitmapPlatformDeviceData> data_;
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_