Remove CSS_REGIONS compile flag from Blink.

Source/core/css/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 3176 matching lines @@
     case CSSPropertyWebkitAlignContent:
     case CSSPropertyWebkitAlignItems:
     case CSSPropertyWebkitAlignSelf:
     case CSSPropertyWebkitFlexBasis:
     case CSSPropertyWebkitFlexDirection:
     case CSSPropertyWebkitFlexGrow:
     case CSSPropertyWebkitFlexShrink:
     case CSSPropertyWebkitFlexWrap:
     case CSSPropertyWebkitJustifyContent:
     case CSSPropertyWebkitOrder:
-#if ENABLE(CSS_REGIONS)
     case CSSPropertyWebkitFlowFrom:
     case CSSPropertyWebkitFlowInto:
-#endif
     case CSSPropertyWebkitFontKerning:
     case CSSPropertyWebkitFontSmoothing:
     case CSSPropertyWebkitFontVariantLigatures:
     case CSSPropertyWebkitHighlight:
     case CSSPropertyWebkitHyphenateCharacter:
     case CSSPropertyWebkitHyphenateLimitAfter:
     case CSSPropertyWebkitHyphenateLimitBefore:
     case CSSPropertyWebkitHyphenateLimitLines:
     case CSSPropertyWebkitHyphens:
     case CSSPropertyWebkitLineAlign:
@@ skipping 18 matching lines @@
     case CSSPropertyWebkitMaskOrigin:
     case CSSPropertyWebkitMaskPositionX:
     case CSSPropertyWebkitMaskPositionY:
     case CSSPropertyWebkitMaskRepeatX:
     case CSSPropertyWebkitMaskRepeatY:
     case CSSPropertyWebkitMaskSize:
     case CSSPropertyWebkitPerspectiveOrigin:
     case CSSPropertyWebkitPerspectiveOriginX:
     case CSSPropertyWebkitPerspectiveOriginY:
     case CSSPropertyWebkitPrintColorAdjust:
-#if ENABLE(CSS_REGIONS)
     case CSSPropertyWebkitRegionBreakAfter:

[eseidel, 2013/04/30 00:11:09]

Does StyleResolver::applyProperty check (or ASSERT)
RuntimeCSSEnabled::isCSSPropertyEnabled()?

     case CSSPropertyWebkitRegionBreakBefore:
     case CSSPropertyWebkitRegionBreakInside:
     case CSSPropertyWebkitRegionOverflow:
-#endif
     case CSSPropertyWebkitRtlOrdering:
     case CSSPropertyWebkitRubyPosition:
     case CSSPropertyWebkitTextCombine:
 #if ENABLE(CSS3_TEXT)
     case CSSPropertyWebkitTextDecorationLine:
     case CSSPropertyWebkitTextDecorationStyle:
     case CSSPropertyWebkitTextDecorationColor:
     case CSSPropertyWebkitTextAlignLast:
     case CSSPropertyWebkitTextUnderlinePosition:
 #endif // CSS3_TEXT
@@ skipping 1392 matching lines @@
     info.addMember(m_state, "state");
 
     // FIXME: move this to a place where it would be called only once?
     info.addMember(CSSDefaultStyleSheets::defaultStyle, "defaultStyle");
     info.addMember(CSSDefaultStyleSheets::defaultQuirksStyle, "defaultQuirksStyle");
     info.addMember(CSSDefaultStyleSheets::defaultPrintStyle,"defaultPrintStyle");
     info.addMember(CSSDefaultStyleSheets::defaultViewSourceStyle, "defaultViewSourceStyle");
 }
 
 } // namespace WebCore