CL removing inheritance of SkDevice from PlatformDevice. Flavours of PlatformDevice classes now ...

skia/ext/bitmap_platform_device_mac.h

 // 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.
 
 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "skia/ext/platform_device_mac.h"
 
 namespace skia {
 
 // 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
 // another bitmap to this device's bitmap and everything will work properly.
 // For us, that other bitmap will become invalid as soon as the device becomes
 // invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE
 // DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead.
-class BitmapPlatformDevice : public PlatformDevice {
+class BitmapPlatformDevice : public PlatformDevice, public SkDevice {
  public:
   // |context| may be NULL.
   static BitmapPlatformDevice* Create(CGContextRef context,
                                       int width, int height,
                                       bool is_opaque);
 
   // Creates a context for |data| and calls Create.
   static BitmapPlatformDevice* CreateWithData(uint8_t* data,
                                               int width, int height,
                                               bool is_opaque);
@@ skipping 31 matching lines @@
   // Data associated with this device, guaranteed non-null. We hold a reference
   // to this object.
   BitmapPlatformDeviceData* data_;
 
   DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_