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diff --git a/chromium/third_party/WebKit/Source/core/rendering/compositing/CompositingTriggers.h b/chromium/third_party/WebKit/Source/core/rendering/compositing/CompositingTriggers.h
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+/*
+ * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ * Copyright (C) 2012 Samsung Electronics. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef CompositingTriggers_h
+#define CompositingTriggers_h
+
+namespace WebCore {
+
+enum CompositingTrigger {
+    VideoTrigger = 1 << 1,
+    CanvasTrigger = 1 << 3,
+    FilterTrigger = 1 << 5,
+    ScrollableInnerFrameTrigger = 1 << 6,
+    OverflowScrollTrigger = 1 << 7,
+    ViewportConstrainedPositionedTrigger = 1 << 8,
+    AllCompositingTriggers = 0xFFFFFFFF,
+};
+
+typedef unsigned CompositingTriggerFlags;
+
+}
+
+#endif