Add CC software renderer.

cc/test/FakeWebCompositorSoftwareOutputDevice.h

Index: cc/test/FakeWebCompositorSoftwareOutputDevice.h
diff --git a/cc/test/FakeWebCompositorSoftwareOutputDevice.h b/cc/test/FakeWebCompositorSoftwareOutputDevice.h
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+++ b/cc/test/FakeWebCompositorSoftwareOutputDevice.h
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+// 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 FakeWebCompositorSoftwareOutputDevice_h
+#define FakeWebCompositorSoftwareOutputDevice_h
+
+#include "SkDevice.h"
+#include <public/WebCompositorSoftwareOutputDevice.h>
+#include <public/WebImage.h>
+#include <public/WebSize.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+
+namespace WebKit {
+
+class FakeWebCompositorSoftwareOutputDevice : public WebCompositorSoftwareOutputDevice {
+public:
+    virtual WebImage* lock(bool forWrite) OVERRIDE
+    {
+        ASSERT(m_device);
+        m_image = m_device->accessBitmap(forWrite);
+        return &m_image;
+    }
+    virtual void unlock() OVERRIDE
+    {
+        m_image.reset();
+    }
+
+    virtual void didChangeViewportSize(WebSize size) OVERRIDE
+    {
+        if (m_device.get() && size.width == m_device->width() && size.height == m_device->height())
+            return;
+
+        m_device = adoptPtr(new SkDevice(SkBitmap::kARGB_8888_Config, size.width, size.height, true));
+    }
+
+private:
+    OwnPtr<SkDevice> m_device;
+    WebImage m_image;
+};
+
+} // namespace WebKit
+
+#endif // FakeWebCompositorSoftwareOutputDevice_h