Fixed a few styles issues in skia::PlatformDevice. Made function names consistent. Added Begin/En...

skia/ext/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_PLATFORM_DEVICE_MAC_H_
 #define SKIA_EXT_PLATFORM_DEVICE_MAC_H_
 #pragma once
 
 #import <ApplicationServices/ApplicationServices.h>
 #include "third_party/skia/include/core/SkDevice.h"
@@ skipping 26 matching lines @@
   // the entirety of the source device will be copied.
   virtual void DrawToContext(CGContextRef context, int x, int y,
                              const CGRect* src_rect) = 0;
 
   // Returns if the preferred rendering engine is vectorial or bitmap based.
   virtual bool IsVectorial() = 0;
 
   // Returns if native platform APIs are allowed to render text to this device.
   virtual bool IsNativeFontRenderingAllowed();
 
+  virtual PlatformSurface BeginPlatformPaint();
+  virtual void EndPlatformPaint();
+
   // Initializes the default settings and colors in a device context.
   static void InitializeCGContext(CGContextRef context);
 
   // Loads a SkPath into the CG context. The path can there after be used for
   // clipping or as a stroke.
   static void LoadPathToCGContext(CGContextRef context, const SkPath& path);
 
   // Loads a SkRegion into the CG context.
   static void LoadClippingRegionToCGContext(CGContextRef context,
                                             const SkRegion& region,
                                             const SkMatrix& transformation);
 
  protected:
   // Forwards |bitmap| to SkDevice's constructor.
   PlatformDevice(const SkBitmap& bitmap);
 
   // Loads the specified Skia transform into the device context
   static void LoadTransformToCGContext(CGContextRef context,
                                        const SkMatrix& matrix);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_PLATFORM_DEVICE_MAC_H_