Add CSS parser support for break-after, break-before and break-inside.

third_party/WebKit/Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 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
@@ skipping 585 matching lines @@
     RefPtrWillBeRawPtr<EditingStyle> copy = EditingStyle::create();
     if (m_mutableStyle)
         copy->m_mutableStyle = m_mutableStyle->mutableCopy();
     copy->m_isMonospaceFont = m_isMonospaceFont;
     copy->m_fontSizeDelta = m_fontSizeDelta;
     return copy;
 }
 
 // This is the list of CSS properties that apply specially to block-level elements.
 static const CSSPropertyID staticBlockProperties[] = {
+    CSSPropertyBreakAfter,
+    CSSPropertyBreakBefore,
+    CSSPropertyBreakInside,
     CSSPropertyOrphans,
     CSSPropertyOverflow, // This can be also be applied to replaced elements
     CSSPropertyWebkitColumnCount,
     CSSPropertyWebkitColumnGap,
     CSSPropertyWebkitColumnRuleColor,
     CSSPropertyWebkitColumnRuleStyle,
     CSSPropertyWebkitColumnRuleWidth,
     CSSPropertyWebkitColumnBreakBefore,
     CSSPropertyWebkitColumnBreakAfter,
     CSSPropertyWebkitColumnBreakInside,
@@ skipping 1108 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle.get()))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 } // namespace blink