Roll third_party/icu to include Chinmay's iOS gn build fixes

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of 'src').
 #
@@ skipping 41 matching lines @@
   'src/testing/gtest':
    Var('chromium_git') + '/external/googletest.git' + '@' + 'be1868139ffe0ccd0e8e3b37292b84c821d9c8ad', # from svn revision 704
 
   'src/testing/gmock':
    Var('chromium_git') + '/external/googlemock.git' + '@' + '29763965ab52f24565299976b936d1265cb6a271', # from svn revision 501
 
   'src/third_party/angle':
    Var('chromium_git') + '/angle/angle.git' + '@' +  Var('angle_revision'),
 
   'src/third_party/icu':
-   Var('chromium_git') + '/chromium/deps/icu.git' + '@' + '7c81740601355556e630da515b74d889ba2f8d08',
+   Var('chromium_git') + '/chromium/deps/icu.git' + '@' + 'c3f79166089e5360c09e3053fce50e6e296c3204',
 
   'src/tools/grit':
     Var('chromium_git') + '/external/grit-i18n.git' + '@' + 'c1b1591a05209c1ad467e845ba8543c22f9072af', # from svn revision 189
 
   'src/v8':
     Var('chromium_git') + '/v8/v8.git' + '@' +  Var('v8_revision'),
 
   'src/dart':
     Var('chromium_git') + '/external/github.com/dart-lang/sdk.git' + '@' + Var('dart_revision'),
 
@@ skipping 294 matching lines @@
     'name': 'keyboard_native_resources',
     'pattern': '',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--no_auth',
                 '--bucket', 'mojo/keyboard_native',
                 '-d', 'src/services/keyboard_native/res',
     ],
   },
 ]