Allow C++11 in unittests.

test/unittests/unittests.gyp

Index: test/unittests/unittests.gyp
diff --git a/test/unittests/unittests.gyp b/test/unittests/unittests.gyp
index d5731ccb1892e17ccfc0f302c182f83f1acd5143..79ab8bb272c3541266b320de0ead56f9db6d4eac 100644
--- a/test/unittests/unittests.gyp
+++ b/test/unittests/unittests.gyp
@@ -255,18 +255,6 @@
             '<(icu_gyp_path):icuuc',
           ],
         }],
-        ['os_posix == 1', {
-          # TODO(svenpanne): This is a temporary work-around to fix the warnings
-          # that show up because we use -std=gnu++0x instead of -std=c++11.
-          'cflags!': [
-            '-pedantic',
-          ],
-          'direct_dependent_settings': {
-            'cflags!': [
-              '-pedantic',
-            ],
-          },
-        }],
       ],
     },
   ],