Move TextStream to Source/platform/text/

Source/core/core.gypi

 {
     'variables': {
         'core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSKeyframeRule.idl',
@@ skipping 3164 matching lines @@
             'platform/text/QuotedPrintable.cpp',
             'platform/text/RegularExpression.cpp',
             'platform/text/SegmentedString.cpp',
             '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/transcoder/FontTranscoder.cpp',
             'platform/text/transcoder/FontTranscoder.h',
             'platform/win/SystemInfo.cpp',
             'platform/win/SystemInfo.h',
         ],
         'webcore_platform_geometry_files': [
             'platform/graphics/FloatPolygon.cpp',
             'platform/graphics/Region.cpp',
         ],
@@ skipping 607 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++"'
               }],
          ],
     }
 }