Initial import attempt, just to play with. Many things disabled/removed

ui/cc/cc/CCSingleThreadProxy.h

Index: ui/cc/cc/CCSingleThreadProxy.h
diff --git a/ui/cc/cc/CCSingleThreadProxy.h b/ui/cc/cc/CCSingleThreadProxy.h
new file mode 100644
index 0000000000000000000000000000000000000000..e8aa75515366df4602852ec55ba5e3ce48656135
--- /dev/null
+++ b/ui/cc/cc/CCSingleThreadProxy.h
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2011 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CCSingleThreadProxy_h
+#define CCSingleThreadProxy_h
+
+#include "cc/CCAnimationEvents.h"
+#include "cc/CCLayerTreeHostImpl.h"
+#include "cc/CCProxy.h"
+#include <limits>
+#include <wtf/OwnPtr.h>
+
+namespace WebCore {
+
+class CCLayerTreeHost;
+
+class CCSingleThreadProxy : public CCProxy, CCLayerTreeHostImplClient {
+public:
+    static PassOwnPtr<CCProxy> create(CCLayerTreeHost*);
+    virtual ~CCSingleThreadProxy();
+
+    // CCProxy implementation
+    virtual bool compositeAndReadback(void *pixels, const IntRect&) OVERRIDE;
+    virtual void startPageScaleAnimation(const IntSize& targetPosition, bool useAnchor, float scale, double duration) OVERRIDE;
+    virtual void finishAllRendering() OVERRIDE;
+    virtual bool isStarted() const OVERRIDE;
+    virtual bool initializeContext() OVERRIDE;
+    virtual void setSurfaceReady() OVERRIDE;
+    virtual void setVisible(bool) OVERRIDE;
+    virtual bool initializeLayerRenderer() OVERRIDE;
+    virtual bool recreateContext() OVERRIDE;
+    virtual int compositorIdentifier() const OVERRIDE { return m_compositorIdentifier; }
+    virtual void implSideRenderingStats(CCRenderingStats&) OVERRIDE;
+    virtual const LayerRendererCapabilities& layerRendererCapabilities() const OVERRIDE;
+    virtual void loseContext() OVERRIDE;
+    virtual void setNeedsAnimate() OVERRIDE;
+    virtual void setNeedsCommit() OVERRIDE;
+    virtual void setNeedsRedraw() OVERRIDE;
+    virtual bool commitRequested() const OVERRIDE;
+    virtual void didAddAnimation() OVERRIDE;
+    virtual void start() OVERRIDE;
+    virtual void stop() OVERRIDE;
+    virtual size_t maxPartialTextureUpdates() const OVERRIDE { return std::numeric_limits<size_t>::max(); }
+    virtual void acquireLayerTextures() OVERRIDE { }
+    virtual void setFontAtlas(PassOwnPtr<CCFontAtlas>) OVERRIDE;
+    virtual void forceSerializeOnSwapBuffers() OVERRIDE;
+
+    // CCLayerTreeHostImplClient implementation
+    virtual void didLoseContextOnImplThread() OVERRIDE { }
+    virtual void onSwapBuffersCompleteOnImplThread() OVERRIDE { ASSERT_NOT_REACHED(); }
+    virtual void setNeedsRedrawOnImplThread() OVERRIDE { m_layerTreeHost->scheduleComposite(); }
+    virtual void setNeedsCommitOnImplThread() OVERRIDE { m_layerTreeHost->scheduleComposite(); }
+    virtual void postAnimationEventsToMainThreadOnImplThread(PassOwnPtr<CCAnimationEventsVector>, double wallClockTime) OVERRIDE;
+
+    // Called by the legacy path where RenderWidget does the scheduling.
+    void compositeImmediately();
+
+private:
+    explicit CCSingleThreadProxy(CCLayerTreeHost*);
+
+    bool commitAndComposite();
+    void doCommit(CCTextureUpdater&);
+    bool doComposite();
+    void didSwapFrame();
+
+    // Accessed on main thread only.
+    CCLayerTreeHost* m_layerTreeHost;
+    bool m_contextLost;
+    int m_compositorIdentifier;
+
+    // Holds on to the context between initializeContext() and initializeLayerRenderer() calls. Shouldn't
+    // be used for anything else.
+    OwnPtr<CCGraphicsContext> m_contextBeforeInitialization;
+
+    // Used on the CCThread, but checked on main thread during initialization/shutdown.
+    OwnPtr<CCLayerTreeHostImpl> m_layerTreeHostImpl;
+    bool m_layerRendererInitialized;
+    LayerRendererCapabilities m_layerRendererCapabilitiesForMainThread;
+
+    bool m_nextFrameIsNewlyCommittedFrame;
+};
+
+// For use in the single-threaded case. In debug builds, it pretends that the
+// code is running on the thread to satisfy assertion checks.
+class DebugScopedSetImplThread {
+public:
+    DebugScopedSetImplThread()
+    {
+#if !ASSERT_DISABLED
+        CCProxy::setCurrentThreadIsImplThread(true);
+#endif
+    }
+    ~DebugScopedSetImplThread()
+    {
+#if !ASSERT_DISABLED
+        CCProxy::setCurrentThreadIsImplThread(false);
+#endif
+    }
+};
+
+// For use in the single-threaded case. In debug builds, it pretends that the
+// code is running on the main thread to satisfy assertion checks.
+class DebugScopedSetMainThread {
+public:
+    DebugScopedSetMainThread()
+    {
+#if !ASSERT_DISABLED
+        CCProxy::setCurrentThreadIsImplThread(false);
+#endif
+    }
+    ~DebugScopedSetMainThread()
+    {
+#if !ASSERT_DISABLED
+        CCProxy::setCurrentThreadIsImplThread(true);
+#endif
+    }
+};
+
+} // namespace WebCore
+
+#endif