Add CSS support for Containment

third_party/WebKit/Source/core/style/ComputedStyleConstants.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 467 matching lines @@
     TouchActionDoubleTapZoom = 0x20,
     TouchActionAuto = TouchActionManipulation | TouchActionDoubleTapZoom
 };
 inline TouchAction operator| (TouchAction a, TouchAction b) { return static_cast<TouchAction>(int(a) | int(b)); }
 inline TouchAction& operator|= (TouchAction& a, TouchAction b) { return a = a | b; }
 inline TouchAction operator& (TouchAction a, TouchAction b) { return static_cast<TouchAction>(int(a) & int(b)); }
 inline TouchAction& operator&= (TouchAction& a, TouchAction b) { return a = a & b; }
 
 enum EIsolation { IsolationAuto, IsolationIsolate };
 
+static const size_t ContainmentBits = 3;
+enum Containment {
+    ContainsNone = 0x0,
+    ContainsLayout = 0x1,
+    ContainsStyle = 0x2,
+    ContainsPaint = 0x4,
+    ContainsStrict = ContainsLayout | ContainsStyle | ContainsPaint,
+};
+inline Containment operator| (Containment a, Containment b) { return Containment(int(a) | int(b)); }
+inline Containment& operator|= (Containment& a, Containment b) { return a = a | b; }
+
 enum ItemPosition {
     ItemPositionAuto,
     ItemPositionStretch,
     ItemPositionBaseline,
     ItemPositionLastBaseline,
     ItemPositionCenter,
     ItemPositionStart,
     ItemPositionEnd,
     ItemPositionSelfStart,
     ItemPositionSelfEnd,
@@ skipping 45 matching lines @@
 
 enum ScrollSnapType {
     ScrollSnapTypeNone,
     ScrollSnapTypeMandatory,
     ScrollSnapTypeProximity
 };
 
 } // namespace blink
 
 #endif // ComputedStyleConstants_h