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diff --git a/Source/web/FullscreenController.h b/Source/web/FullscreenController.h
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+/*
+ * Copyright (C) 2013 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 FullscreenController_h
+#define FullscreenController_h
+
+#include "core/platform/graphics/IntSize.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/RefPtr.h"
+
+namespace WebCore {
+class Element;
+class Frame;
+}
+
+namespace WebKit {
+class WebViewImpl;
+
+class FullscreenController {
+public:
+    static PassOwnPtr<FullscreenController> create(WebViewImpl*);
+
+    void willEnterFullScreen();
+    void didEnterFullScreen();
+    void willExitFullScreen();
+    void didExitFullScreen();
+
+    void enterFullScreenForElement(WebCore::Element*);
+    void exitFullScreenForElement(WebCore::Element*);
+
+protected:
+    explicit FullscreenController(WebViewImpl*);
+
+private:
+    WebViewImpl* m_webViewImpl;
+
+    float m_exitFullscreenPageScaleFactor;
+    WebCore::IntSize m_exitFullscreenScrollOffset;
+
+    // If set, the WebView is transitioning to fullscreen for this element.
+    RefPtr<WebCore::Element> m_provisionalFullScreenElement;
+
+    // If set, the WebView is in fullscreen mode for an element in this frame.
+    RefPtr<WebCore::Frame> m_fullScreenFrame;
+
+    bool m_isCancelingFullScreen;
+};
+
+}
+
+#endif
+