Assert on BeginPlatformPaint/EndPlatformPaint mismatch.

skia/ext/bitmap_platform_device_win.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_BITMAP_PLATFORM_DEVICE_WIN_H_
-#define SKIA_BITMAP_PLATFORM_DEVICE_WIN_H_
+#ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_
+#define SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_
 #pragma once
 
 #include "skia/ext/platform_device_win.h"
 
 namespace skia {
 
 class BitmapPlatformDeviceFactory : public SkDeviceFactory {
  public:
-  virtual SkDevice* newDevice(SkCanvas* ignored, SkBitmap::Config config, 
+  virtual SkDevice* newDevice(SkCanvas* ignored, 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 Windows can also write
 // to. BitmapPlatformDevice creates a bitmap using CreateDIBSection() in a
 // format that Skia supports and can then use this to draw ClearType into, etc.
 // This pixel data is provided to the bitmap that the device contains so that it
 // can be shared.
@@ skipping 39 matching lines @@
   // around to another routine willing to deal with the bitmap data directly.
   BitmapPlatformDevice(const BitmapPlatformDevice& other);
   virtual ~BitmapPlatformDevice();
 
   // See warning for copy constructor above.
   BitmapPlatformDevice& operator=(const BitmapPlatformDevice& other);
 
   // Retrieves the bitmap DC, which is the memory DC for our bitmap data. The
   // bitmap DC is lazy created.
   virtual PlatformSurface BeginPlatformPaint();
+  virtual void EndPlatformPaint();
 
   // Loads the given transform and clipping region into the HDC. This is
   // overridden from SkDevice.
   virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region,
                              const SkClipStack&);
 
   virtual void drawToHDC(HDC dc, int x, int y, const RECT* src_rect);
   virtual void makeOpaque(int x, int y, int width, int height);
   virtual bool IsVectorial() { return false; }
 
@@ skipping 16 matching lines @@
   // bitmaps used by the base device class are already refcounted and copyable.
   class BitmapPlatformDeviceData;
 
   // Private constructor. The data should already be ref'ed for us.
   BitmapPlatformDevice(BitmapPlatformDeviceData* data,
                        const SkBitmap& bitmap);
 
   // Data associated with this device, guaranteed non-null. We hold a reference
   // to this object.
   BitmapPlatformDeviceData* data_;
+
+#ifdef SK_DEBUG
+  int begin_paint_count_;
+#endif
 };
 
 }  // namespace skia
 
-#endif  // SKIA_BITMAP_PLATFORM_DEVICE_WIN_H_
+#endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_