Optionally clear PlatformCanvas instances.

skia/ext/vector_platform_device_emf_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_EXT_VECTOR_PLATFORM_DEVICE_EMF_WIN_H_
 #define SKIA_EXT_VECTOR_PLATFORM_DEVICE_EMF_WIN_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "skia/ext/platform_device.h"
 #include "third_party/skia/include/core/SkMatrix.h"
 #include "third_party/skia/include/core/SkRegion.h"
 
 namespace skia {
 
 // A device is basically a wrapper around SkBitmap that provides a surface for
 // SkCanvas to draw into. This specific device is not not backed by a surface
 // and is thus unreadable. This is because the backend is completely vectorial.
 // This device is a simple wrapper over a Windows device context (HDC) handle.
 class VectorPlatformDeviceEmf : public PlatformDevice, public SkDevice {
  public:
-  SK_API static SkDevice* CreateDevice(int width, int height, bool isOpaque,
+  SK_API static SkDevice* CreateDevice(int width, int height, int flags,
                                        HANDLE shared_section);
 
   // Factory function. The DC is kept as the output context.
   static SkDevice* create(HDC dc, int width, int height);
 
   VectorPlatformDeviceEmf(HDC dc, const SkBitmap& bitmap);
   virtual ~VectorPlatformDeviceEmf();
 
   // PlatformDevice methods
   virtual PlatformSurface BeginPlatformPaint() OVERRIDE;
@@ skipping 95 matching lines @@
 
   // True if AlphaBlend() was called during this print.
   bool alpha_blend_used_;
 
   DISALLOW_COPY_AND_ASSIGN(VectorPlatformDeviceEmf);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_VECTOR_PLATFORM_DEVICE_EMF_WIN_H_