More memory suppressions:

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 207758)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -7294,3 +7294,25 @@
    fun:_ZN7content21ContentMainRunnerImpl10InitializeEiPPKcPNS_19ContentMainDelegateE
    fun:_ZN7content11ContentMainEiPPKcPNS_19ContentMainDelegateE
 }
+{
+   bug_252615
+   Memcheck:Leak
+   fun:malloc
+   fun:XGetWindowProperty
+   fun:XFetchName
+   fun:_ZN3ash4test12_GLOBAL__N_114GetXWindowNameEPN4aura10RootWindowE
+   fun:_ZN3ash4test50DisplayControllerTest_XWidowNameForRootWindow_Test8TestBodyEv
+}
+{
+   bug_252641
+   Memcheck:Uninitialized
+   fun:pthread_rwlock_init$UNIX2003
+   fun:_ZN3re25MutexC2Ev
+   fun:_ZN3re25MutexC1Ev
+   ...
+   fun:_ZN11leveldb_env19ParseMethodAndErrorEPKcPNS_8MethodIDEPi
+   fun:_ZN7contentL21HistogramLevelDBErrorERKSsRKN7leveldb6StatusE
+   fun:_ZN7content15LevelDBDatabase4OpenERKN4base8FilePathEPKNS_17LevelDBComparatorEPb
+   fun:_ZN7content12_GLOBAL__N_139LevelDBDatabaseTest_CorruptionTest_Test8TestBodyEv
+}
+