Suppression for memory leak in unit test using BookmarkBarFolderController

tools/valgrind/memcheck/suppressions_mac.txt

Index: tools/valgrind/memcheck/suppressions_mac.txt
diff --git a/tools/valgrind/memcheck/suppressions_mac.txt b/tools/valgrind/memcheck/suppressions_mac.txt
index a6e679342fe68977205d940677da56ab96f4e292..0756303a5b4dd604ee27997eb61449185b8f28d6 100644
--- a/tools/valgrind/memcheck/suppressions_mac.txt
+++ b/tools/valgrind/memcheck/suppressions_mac.txt
@@ -1298,3 +1298,23 @@
    fun:_ZN8remoting8Capturer19CaptureInvalidRectsEP14CallbackRunnerI6Tuple1I13scoped_refptrINS0_11CaptureDataEEEE
    fun:_ZN8remoting28CapturerMacTest_Capture_Test8TestBodyEv
 }
+{
+   bug_49638
+   Memcheck:Addr4
+   fun:-[BookmarkButton isFolder]
+   fun:-[BookmarkBarFolderController openBookmarkFolderFromButtonAndCloseOldOne:]
+   fun:__NSFireDelayedPerform
+   fun:CFRunLoopRunSpecific
+   fun:CFRunLoopRunInMode
+   fun:RunCurrentEventLoopInMode
+   fun:ReceiveNextEventCommon
+   fun:BlockUntilNextEventMatchingListInMode
+   fun:_DPSNextEvent
+   fun:-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
+   fun:_ZN9CocoaTest8TearDownEv
+   fun:_ZN7testing8internal12TestInfoImpl3RunEv
+   fun:_ZN7testing8TestCase3RunEv
+   fun:_ZN7testing8internal12UnitTestImpl11RunAllTestsEv
+   fun:_ZN9TestSuite3RunEv
+   fun:main
+}