cc: Move WebCompositorOutputSurface and related classes into cc/

cc/software_output_device.h

+// Copyright 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 CC_SOFTWARE_OUTPUT_DEVICE_H_
+#define CC_SOFTWARE_OUTPUT_DEVICE_H_
+
+#include "third_party/WebKit/Source/Platform/chromium/public/WebImage.h"
+#include "ui/gfx/size.h"
+
+namespace cc {
+
+// This is a "tear-off" class providing software drawing support to
+// OutputSurface, such as to a platform-provided window framebuffer.
+class SoftwareOutputDevice {
+ public:
+  virtual ~SoftwareOutputDevice() {}
+
+  // Lock the framebuffer and return a pointer to a WebImage referring to its
+  // pixels. Set forWrite if you intend to change the pixels. Readback
+  // is supported whether or not forWrite is set.
+  // TODO(danakj): Switch this from WebImage to a Skia type.
+  virtual WebKit::WebImage* Lock(bool forWrite) = 0;
+  virtual void Unlock() = 0;
+
+  virtual void DidChangeViewportSize(gfx::Size) = 0;
+};
+
+}  // namespace cc
+
+#endif // CC_SOFTWARE_OUTPUT_DEVICE_H_