Remove ENTITY_REFERENCE_NODE

Source/core/core.gypi

 
 {
     'variables': {
         'core_idl_files': [
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSMediaRule.idl',
@@ skipping 48 matching lines @@
             'dom/DOMStringList.idl',
             'dom/DOMStringMap.idl',
             'dom/DataTransferItem.idl',
             'dom/DataTransferItemList.idl',
             'dom/DeviceOrientationEvent.idl',
             'dom/Document.idl',
             'dom/DocumentFragment.idl',
             'dom/DocumentType.idl',
             'dom/Element.idl',
             'dom/Entity.idl',
-            'dom/EntityReference.idl',
             'dom/ErrorEvent.idl',
             'dom/Event.idl',
             'dom/EventException.idl',
             'dom/EventTarget.idl',
             'dom/FocusEvent.idl',
             'dom/HashChangeEvent.idl',
             'dom/KeyboardEvent.idl',
             'dom/MessageChannel.idl',
             'dom/MessageEvent.idl',
             'dom/MessagePort.idl',
@@ skipping 1660 matching lines @@
             'dom/DocumentOrderedMap.cpp',
             'dom/DocumentParser.cpp',
             'dom/DocumentSharedObjectPool.cpp',
             'dom/DocumentStyleSheetCollection.cpp',
             'dom/DocumentType.cpp',
             'dom/ElementShadow.cpp',
             'dom/Element.cpp',
             'dom/ElementRareData.cpp',
             'dom/ElementRareData.h',
             'dom/Entity.h',
-            'dom/EntityReference.cpp',
-            'dom/EntityReference.h',
             'dom/ErrorEvent.cpp',
             'dom/ErrorEvent.h',
             'dom/Event.cpp',
             'dom/EventContext.cpp',
             'dom/EventContext.h',
             'dom/EventDispatchMediator.cpp',
             'dom/EventDispatchMediator.h',
             'dom/EventDispatcher.cpp',
             'dom/EventDispatcher.h',
             'dom/EventRetargeter.cpp',
@@ skipping 1938 matching lines @@
                 'bison_exe': 'bison',
                 # We specify a preprocess so it happens locally and won't get
                 # distributed to goma.
                 # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to
                 # use /usr/bin/clang once we require Xcode 4.x.
                 'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
               }],
          ],
     }
 }