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diff --git a/Source/WebKit/chromium/public/platform/WebExternalTextureLayer.h b/Source/WebKit/chromium/public/platform/WebExternalTextureLayer.h
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+/*
+ * 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 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 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 WebExternalTextureLayer_h
+#define WebExternalTextureLayer_h
+
+#include "WebCommon.h"
+#include "WebFloatRect.h"
+#include "WebLayer.h"
+
+namespace WebKit {
+class WebExternalTextureLayerImpl;
+
+// This class represents a layer that renders a texture that is generated
+// externally (not managed by the WebLayerTreeView).
+// The texture will be used by the WebLayerTreeView during compositing passes.
+// When in single-thread mode, this means during WebLayerTreeView::composite().
+// When using the threaded compositor, this can mean at an arbitrary time until
+// the WebLayerTreeView is destroyed.
+class WebExternalTextureLayer : public WebLayer {
+public:
+    WEBKIT_EXPORT static WebExternalTextureLayer create();
+
+    WebExternalTextureLayer() { }
+    WebExternalTextureLayer(const WebExternalTextureLayer& layer) : WebLayer(layer) { }
+    virtual ~WebExternalTextureLayer() { }
+    WebExternalTextureLayer& operator=(const WebExternalTextureLayer& layer)
+    {
+        WebLayer::assign(layer);
+        return *this;
+    }
+
+    // Sets the texture id that represents the layer, in the namespace of the
+    // compositor context.
+    WEBKIT_EXPORT void setTextureId(unsigned);
+    WEBKIT_EXPORT unsigned textureId() const;
+
+    // Sets whether or not the texture should be flipped in the Y direction when
+    // rendered.
+    WEBKIT_EXPORT void setFlipped(bool);
+    WEBKIT_EXPORT bool flipped() const;
+
+    // Sets the rect in UV space of the texture that is mapped to the layer
+    // bounds.
+    WEBKIT_EXPORT void setUVRect(const WebFloatRect&);
+    WEBKIT_EXPORT WebFloatRect uvRect() const;
+
+    // Marks a region of the layer as needing a display. These regions are
+    // collected in a union until the display occurs.
+    WEBKIT_EXPORT void invalidateRect(const WebFloatRect&);
+
+#if WEBKIT_IMPLEMENTATION
+    WebExternalTextureLayer(const WTF::PassRefPtr<WebExternalTextureLayerImpl>&);
+    WebExternalTextureLayer& operator=(const WTF::PassRefPtr<WebExternalTextureLayerImpl>&);
+    operator WTF::PassRefPtr<WebExternalTextureLayerImpl>() const;
+#endif
+};
+
+} // namespace WebKit
+
+#endif // WebExternalTextureLayer_h