Suppress an intentional leak after r221427.

NOTRY=true
BUG=264886
TBR=zhaoqin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23719014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221488 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -386,6 +386,18 @@
    fun:allocateBranchIsland
    fun:mach_override_ptr
 }
+{
+   # Intentional leak of a time-based self-deleting object.
+   bug_264886
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN4base26MessagePumpInstrumentation6CreateERKNS_9TimeDeltaES3_
+   fun:_ZN4base24MessagePumpCFRunLoopBase21EnableInstrumentationEv
+   fun:_ZN4base24MessagePumpNSApplicationC2Ev
+   fun:_ZN4base24MessagePumpCrApplicationC2Ev
+   fun:_ZN4base24MessagePumpCrApplicationC1Ev
+   fun:_ZN4base14MessagePumpMac6CreateEv
+}
 
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 {