Implements CSSPropertyAPI for the margin properties.

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
index 0327c7be2dab5ce7ccdc74d8c65e9cf1c8681194..edb71a66469521057f31cc75cbf3bf0b788b08d6 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
@@ -2085,22 +2085,6 @@ const CSSValue* CSSPropertyParser::parseSingleValue(
     case CSSPropertyWebkitLogicalWidth:
     case CSSPropertyWebkitLogicalHeight:
       return CSSPropertyLengthUtils::consumeWidthOrHeight(m_range, m_context);
-    case CSSPropertyMarginTop:
-    case CSSPropertyMarginRight:
-    case CSSPropertyMarginBottom:
-    case CSSPropertyMarginLeft:
-    case CSSPropertyBottom:
-    case CSSPropertyLeft:
-    case CSSPropertyRight:
-    case CSSPropertyTop:
-      return CSSPropertyMarginUtils::consumeMarginOrOffset(
-          m_range, m_context->mode(), UnitlessQuirk::Allow);
-    case CSSPropertyWebkitMarginStart:
-    case CSSPropertyWebkitMarginEnd:
-    case CSSPropertyWebkitMarginBefore:
-    case CSSPropertyWebkitMarginAfter:
-      return CSSPropertyMarginUtils::consumeMarginOrOffset(
-          m_range, m_context->mode(), UnitlessQuirk::Forbid);
     case CSSPropertyScrollSnapDestination:
     case CSSPropertyObjectPosition:
     case CSSPropertyPerspectiveOrigin: