Suppress uninitialized read in file_util::FileEnumerator::Next()

BUG=231969
TBR=gavinp@chromium.org
TEST=waterfall.sh

Review URL: https://codereview.chromium.org/13856008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194395 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -2381,3 +2381,14 @@
    read(buf)
    fun:read$UNIX2003
 }
+{
+   bug_231969
+   Memcheck:Uninitialized
+   fun:rangematch
+   fun:fnmatch1
+   fun:fnmatch1
+   fun:fnmatch$UNIX2003
+   fun:_ZN9file_util14FileEnumerator4NextEv
+   fun:_ZN10disk_cache11SimpleIndex15RestoreFromDiskERKN4base8FilePathE
+   fun:_ZN10disk_cache11SimpleIndex12LoadFromDiskERKN4base8FilePathERK13scoped_refptrINS1_10TaskRunnerEERKNS1_8CallbackIFv10scoped_ptrIN9__gnu_cxx8hash_mapIyNS_13EntryMetadataENSC_4hashIyEESt8equal_toIyESaISE_EEENS1_14DefaultDeleterISK_EEEEEE
+}