Add PlatformPictureSkia and RecordingPlatformDeviceSkia.

skia/ext/platform_picture_skia.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_PLATFORM_PICTURE_SKIA_H_
+#define SKIA_EXT_PLATFORM_PICTURE_SKIA_H_
+
+#include "base/basictypes.h"
+#include "third_party/skia/include/core/SkPicture.h"
+
+class SkCanvas;
+class SkProxyCanvas;
+
+namespace skia {
+
+class SK_API PlatformPictureSkia {
+ public:
+  PlatformPictureSkia();
+  ~PlatformPictureSkia();
+
+  SkCanvas* beginRecording(int width, int height);
+  void endRecording();
+  void drawInto(SkCanvas* canvas);
+
+ private:
+  SkPicture picture_;
+  SkProxyCanvas* record_;
+
+  DISALLOW_COPY_AND_ASSIGN(PlatformPictureSkia);
+};
+
+}  // namespace skia
+
+#endif  // SKIA_EXT_PLATFORM_PICTURE_SKIA_H_