Attempt to enable -Wconversion

llvm-svn: 346451
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: b50daf7a21d2d608d704a47856a5b0ca3060b4c2
diff --git a/utils/libcxx/test/config.py b/utils/libcxx/test/config.py
index f63c41d..218bee9 100644
--- a/utils/libcxx/test/config.py
+++ b/utils/libcxx/test/config.py
@@ -932,7 +932,7 @@
         self.cxx.addWarningFlagIfSupported('-Wunused-parameter')
         self.cxx.addWarningFlagIfSupported('-Wunreachable-code')
         # FIXME: Enable the two warnings below.
-        self.cxx.addWarningFlagIfSupported('-Wno-conversion')
+        # self.cxx.addWarningFlagIfSupported('-Wno-conversion')
         self.cxx.addWarningFlagIfSupported('-Wno-unused-local-typedef')
         std = self.get_lit_conf('std', None)
         if std in ['c++98', 'c++03']: