Implement ::placeholder CSS selector.

third_party/WebKit/Source/core/css/CSSSelector.cpp

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
  *               2001-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
@@ skipping 205 matching lines @@
     case PseudoHover:
     case PseudoDrag:
     case PseudoFocus:
     case PseudoActive:
     case PseudoChecked:
     case PseudoEnabled:
     case PseudoFullPageMedia:
     case PseudoDefault:
     case PseudoDisabled:
     case PseudoOptional:
+    case PseudoPlaceholder:
     case PseudoPlaceholderShown:
     case PseudoRequired:
     case PseudoReadOnly:
     case PseudoReadWrite:
     case PseudoValid:
     case PseudoInvalid:
     case PseudoIndeterminate:
     case PseudoTarget:
     case PseudoLang:
     case PseudoNot:
@@ skipping 114 matching lines @@
     {"last-child", CSSSelector::PseudoLastChild},
     {"last-of-type", CSSSelector::PseudoLastOfType},
     {"left", CSSSelector::PseudoLeftPage},
     {"link", CSSSelector::PseudoLink},
     {"no-button", CSSSelector::PseudoNoButton},
     {"only-child", CSSSelector::PseudoOnlyChild},
     {"only-of-type", CSSSelector::PseudoOnlyOfType},
     {"optional", CSSSelector::PseudoOptional},
     {"out-of-range", CSSSelector::PseudoOutOfRange},
     {"past", CSSSelector::PseudoPastCue},
+    {"placeholder", CSSSelector::PseudoPlaceholder},
     {"placeholder-shown", CSSSelector::PseudoPlaceholderShown},
     {"read-only", CSSSelector::PseudoReadOnly},
     {"read-write", CSSSelector::PseudoReadWrite},
     {"required", CSSSelector::PseudoRequired},
     {"right", CSSSelector::PseudoRightPage},
     {"root", CSSSelector::PseudoRoot},
     {"scope", CSSSelector::PseudoScope},
     {"selection", CSSSelector::PseudoSelection},
     {"shadow", CSSSelector::PseudoShadow},
     {"single-button", CSSSelector::PseudoSingleButton},
@@ skipping 134 matching lines @@
     case PseudoFirstLetter:
     case PseudoFirstLine:
       // The spec says some pseudos allow both single and double colons like
       // :before for backwards compatability. Single colon becomes PseudoClass,
       // but should be PseudoElement like double colon.
       if (m_match == PseudoClass)
         m_match = PseudoElement;
     // fallthrough
     case PseudoBackdrop:
     case PseudoCue:
+    case PseudoPlaceholder:
     case PseudoResizer:
     case PseudoScrollbar:
     case PseudoScrollbarCorner:
     case PseudoScrollbarButton:
     case PseudoScrollbarThumb:
     case PseudoScrollbarTrack:
     case PseudoScrollbarTrackPiece:
     case PseudoSelection:
     case PseudoWebKitCustomElement:
     case PseudoBlinkInternalElement:
@@ skipping 480 matching lines @@
     if (count < nthBValue())
       return false;
     return (count - nthBValue()) % nthAValue() == 0;
   }
   if (count > nthBValue())
     return false;
   return (nthBValue() - count) % (-nthAValue()) == 0;
 }
 
 }  // namespace blink