Remove CSS_REGIONS compile flag from Blink.

Source/core/css/StyleResolver.cpp

Index: Source/core/css/StyleResolver.cpp
diff --git a/Source/core/css/StyleResolver.cpp b/Source/core/css/StyleResolver.cpp
index 33a903ca8ee13a8f04dbd3891fffddba8b1327bf..8d2f7b141f32b6de306abd2573c507af5d9bfeff 100644
--- a/Source/core/css/StyleResolver.cpp
+++ b/Source/core/css/StyleResolver.cpp
@@ -3191,10 +3191,8 @@ void StyleResolver::applyProperty(CSSPropertyID id, CSSValue* value)
     case CSSPropertyWebkitFlexWrap:
     case CSSPropertyWebkitJustifyContent:
     case CSSPropertyWebkitOrder:
-#if ENABLE(CSS_REGIONS)
     case CSSPropertyWebkitFlowFrom:
     case CSSPropertyWebkitFlowInto:
-#endif
     case CSSPropertyWebkitFontKerning:
     case CSSPropertyWebkitFontSmoothing:
     case CSSPropertyWebkitFontVariantLigatures:
@@ -3233,12 +3231,10 @@ void StyleResolver::applyProperty(CSSPropertyID id, CSSValue* value)
     case CSSPropertyWebkitPerspectiveOriginX:
     case CSSPropertyWebkitPerspectiveOriginY:
     case CSSPropertyWebkitPrintColorAdjust:
-#if ENABLE(CSS_REGIONS)
     case CSSPropertyWebkitRegionBreakAfter:
     case CSSPropertyWebkitRegionBreakBefore:
     case CSSPropertyWebkitRegionBreakInside:
     case CSSPropertyWebkitRegionOverflow:
-#endif
     case CSSPropertyWebkitRtlOrdering:
     case CSSPropertyWebkitRubyPosition:
     case CSSPropertyWebkitTextCombine: