Add functions to get the length or compute a substring of UTF8 and UTF16...

base/base.gyp

 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     'base.gypi',
@@ skipping 13 matching lines @@
           'dependencies': [
             # i18n/rtl.cc uses gtk
             '../build/linux/system.gyp:gtk',
           ],
         }],
       ],
       'export_dependent_settings': [
         'base',
       ],
       'sources': [
+        'i18n/char_iterator.cc',
+        'i18n/char_iterator.h',
         'i18n/file_util_icu.cc',
         'i18n/file_util_icu.h',
         'i18n/icu_encoding_detection.cc',
         'i18n/icu_encoding_detection.h',
         'i18n/icu_string_conversions.cc',
         'i18n/icu_string_conversions.h',
         'i18n/icu_util.cc',
         'i18n/icu_util.h',
         'i18n/number_formatting.cc',
         'i18n/number_formatting.h',
@@ skipping 38 matching lines @@
         'event_trace_provider_win_unittest.cc',
         'field_trial_unittest.cc',
         'file_descriptor_shuffle_unittest.cc',
         'file_path_unittest.cc',
         'file_util_unittest.cc',
         'file_version_info_unittest.cc',
         'gmock_unittest.cc',
         'histogram_unittest.cc',
         'hmac_unittest.cc',
         'id_map_unittest.cc',
+        'i18n/char_iterator_unittest.cc',
         'i18n/file_util_icu_unittest.cc',
         'i18n/icu_string_conversions_unittest.cc',
         'i18n/rtl_unittest.cc',
         'i18n/word_iterator_unittest.cc',
         'json/json_reader_unittest.cc',
         'json/json_writer_unittest.cc',
         'json/string_escape_unittest.cc',
         'lazy_instance_unittest.cc',
         'leak_tracker_unittest.cc',
         'linked_list_unittest.cc',
@@ skipping 179 matching lines @@
       ],
     }],
   ],
 }
 
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