Skip -pedantic for GTest as long as we -std=gnu++0x.

test/base-unittests/base-unittests.gyp

Index: test/base-unittests/base-unittests.gyp
diff --git a/test/base-unittests/base-unittests.gyp b/test/base-unittests/base-unittests.gyp
index e88f606c7408555830fc3a4ea4b98689a6fd687d..339269db1bc798f96eddd5f29d0ef7ebd5a6b253 100644
--- a/test/base-unittests/base-unittests.gyp
+++ b/test/base-unittests/base-unittests.gyp
@@ -27,6 +27,15 @@
         'platform/time-unittest.cc',
         'utils/random-number-generator-unittest.cc',
       ],
+      'conditions': [
+        ['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',
+          ],
+        }],
+      ],
     },
   ],
 }