Remove code related to title directionality, we never used it

Source/core/core.gypi

 {
     'variables': {
         'deprecated_perl_core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSMediaRule.idl',
@@ skipping 3175 matching lines @@
             'platform/text/LocaleICU.h',
             'platform/text/LocaleToScriptMapping.h',
             'platform/text/LocaleToScriptMappingDefault.cpp',
             'platform/text/ParserUtilities.h',
             'platform/text/PlatformLocale.cpp',
             'platform/text/PlatformLocale.h',
             'platform/text/QuotedPrintable.h',
             'platform/text/QuotedPrintable.cpp',
             'platform/text/RegularExpression.cpp',
             'platform/text/SegmentedString.cpp',
-            'platform/text/StringWithDirection.h',
             'platform/text/SuffixTree.h',
             'platform/text/TextBoundaries.cpp',
             'platform/text/TextBreakIterator.cpp',
             'platform/text/TextBreakIteratorICU.cpp',
             'platform/text/TextBreakIteratorInternalICU.cpp',
             'platform/text/TextEncodingDetector.h',
             'platform/text/TextEncodingDetectorICU.cpp',
             'platform/text/TextStream.cpp',
             'platform/text/UnicodeRange.cpp',
             'platform/text/cf/AtomicStringCF.cpp',
@@ skipping 637 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++"'
               }],
          ],
     }
 }