[MemSheriff] suppress CreateFileSystemContext leak

BUG=379943
R=thestig@chromium.org
TBR=thestig@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/306013011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274361 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -6487,3 +6487,18 @@
    fun:_ZN7content21ShellBrowserMainParts21PreMainMessageLoopRunEv
    fun:_ZN7content15BrowserMainLoop21PreMainMessageLoopRunEv
 }
+{
+   bug_379943
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN7content23CreateFileSystemContextEPNS_14BrowserContextERKN4base8FilePathEbPN5quota17QuotaManagerProxyE
+   fun:_ZN7content20StoragePartitionImpl6CreateEPNS_14BrowserContextEbRKN4base8FilePathE
+   fun:_ZN7content23StoragePartitionImplMap3GetERKSsS2_b
+   fun:_ZN7content12_GLOBAL__N_129GetStoragePartitionFromConfigEPNS_14BrowserContextERKSsS4_b
+   fun:_ZN7content14BrowserContext19GetStoragePartitionEPS0_PNS_12SiteInstanceE
+   fun:_ZN7content14BrowserContext26GetDefaultStoragePartitionEPS0_
+   fun:_ZN7content21ShellBrowserMainParts21PreMainMessageLoopRunEv
+   fun:_ZN7content15BrowserMainLoop21PreMainMessageLoopRunEv
+}
+