suppress memory leaks from ui::GestureProviderAura::GestureProviderAura

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 6402 matching lines @@
 }
 {
    bug_371860
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:_ZN8feedback20FeedbackUploaderTestC1Ev
    fun:_ZN8feedback*FeedbackUploaderTest*
    fun:_ZN7testing8internal15TestFactoryImplIN8feedback*
 }
+{
+   bug_372143
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN2ui12_GLOBAL__N_121CreateGestureProviderEPNS_25GestureProviderAuraClientE
+   fun:_ZN2ui21GestureRecognizerImpl29GetGestureProviderForConsumerEPNS_15GestureConsumerE
+   fun:_ZN2ui21GestureRecognizerImpl27ProcessTouchEventForGestureERKNS_10TouchEventENS_11EventResultEPNS_15GestureConsumerE
+   fun:_ZN4aura21WindowEventDispatcher17PostDispatchEventEPN2ui11EventTargetERKNS1_5EventE
+   fun:_ZN2ui23EventDispatcherDelegate13DispatchEventEPNS_11EventTargetEPNS_5EventE
+   fun:_ZN2ui14EventProcessor17OnEventFromSourceEPNS_5EventE
+   fun:_ZN4aura4test12AuraTestBase34DispatchEventUsingWindowDispatcherEPN2ui5EventE
+}