Simplify watched selector handling and remove remnants of user stylesheets

Source/core/css/parser/BisonCSSParser-in.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 471 matching lines @@
     case CSSPropertyWebkitBoxDecorationBreak:
         return valueID == CSSValueClone || valueID == CSSValueSlice;
     case CSSPropertyWebkitBoxDirection:
         return valueID == CSSValueNormal || valueID == CSSValueReverse;
     case CSSPropertyWebkitBoxLines:
         return valueID == CSSValueSingle || valueID == CSSValueMultiple;
     case CSSPropertyWebkitBoxOrient:
         return valueID == CSSValueHorizontal || valueID == CSSValueVertical || valueID == CSSValueInlineAxis || valueID == CSSValueBlockAxis;
     case CSSPropertyWebkitBoxPack:
         return valueID == CSSValueStart || valueID == CSSValueEnd || valueID == CSSValueCenter || valueID == CSSValueJustify;
-    case CSSPropertyInternalCallback:
-        // This property is only injected programmatically, not parsed from stylesheets.
-        return false;
     case CSSPropertyColumnFill:
         return RuntimeEnabledFeatures::regionBasedColumnsEnabled()
             && (valueID == CSSValueAuto || valueID == CSSValueBalance);
     case CSSPropertyAlignContent:
         // FIXME: Per CSS alignment, this property should accept an optional <overflow-position>. We should share this parsing code with 'justify-self'.
         return valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueSpaceBetween || valueID == CSSValueSpaceAround || valueID == CSSValueStretch;
     case CSSPropertyAlignItems:
         // FIXME: Per CSS alignment, this property should accept the same arguments as 'justify-self' so we should share its parsing code.
         return valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch;
     case CSSPropertyAlignSelf:
@@ skipping 108 matching lines @@
     case CSSPropertyWebkitBorderBeforeStyle:
     case CSSPropertyWebkitBorderEndStyle:
     case CSSPropertyWebkitBorderFit:
     case CSSPropertyWebkitBorderStartStyle:
     case CSSPropertyWebkitBoxAlign:
     case CSSPropertyWebkitBoxDecorationBreak:
     case CSSPropertyWebkitBoxDirection:
     case CSSPropertyWebkitBoxLines:
     case CSSPropertyWebkitBoxOrient:
     case CSSPropertyWebkitBoxPack:
-    case CSSPropertyInternalCallback:
     case CSSPropertyWebkitColumnBreakAfter:
     case CSSPropertyWebkitColumnBreakBefore:
     case CSSPropertyWebkitColumnBreakInside:
     case CSSPropertyColumnFill:
     case CSSPropertyWebkitColumnRuleStyle:
     case CSSPropertyAlignContent:
     case CSSPropertyFlexDirection:
     case CSSPropertyFlexWrap:
     case CSSPropertyJustifyContent:
     case CSSPropertyFontKerning:
@@ skipping 1471 matching lines @@
     rule->setProperties(createStylePropertySet());
     clearProperties();
 
     StyleRuleViewport* result = rule.get();
     m_parsedRules.append(rule.release());
 
     return result;
 }
 
 }