Revert "Revert "add new signature so skia can rely on it (subclass of SkDevice)""

skia/ext/bitmap_platform_device_mac.h

 // 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.
 
 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "skia/ext/platform_device.h"
@@ skipping 40 matching lines @@
   // SkBaseDevice overrides
   void setMatrixClip(const SkMatrix& transform,
                      const SkRegion& region,
                      const SkClipStack&) override;
 
  protected:
   BitmapPlatformDevice(CGContextRef context,
                        const SkBitmap& bitmap);
 
   SkBaseDevice* onCreateCompatibleDevice(const CreateInfo& info) override;
+  SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;
 
  private:
   void ReleaseBitmapContext();
 
   // Sets the transform and clip operations. This will not update the CGContext,
   // but will mark the config as dirty. The next call of LoadConfig will
   // pick up these changes.
   void SetMatrixClip(const SkMatrix& transform, const SkRegion& region);
 
   // Loads the current transform and clip into the context. Can be called even
@@ skipping 14 matching lines @@
   SkMatrix transform_;
 
   // The current clipping
   SkRegion clip_region_;
   DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_