Suppress bug 50484 (leaks in BrowserWithTestWindowTest::SetUp)...

tools/heapcheck/suppressions.txt

 # There are three 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 # running overnight and removing outdated bugs/suppressions.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 974 matching lines @@
 # "Schedule*" stands for {ScheduleImmediately,ScheduleWithDelay}.
 {
    bug_50345
    Heapcheck:Leak
    ...
    fun:ScopedRunnableMethodFactory::NewRunnableMethod
    fun:sync_notifier::ChromeSystemResources::MakeTaskToPost
    fun:sync_notifier::ChromeSystemResources::Schedule*
    fun:sync_notifier::::ChromeSystemResourcesTest::ScheduleShouldNotRun
 }
+
+{
+   bug_50484
+   Heapcheck:Leak
+   ...
+   fun:SyncSetupWizard
+   fun:ProfileSyncService
+   fun:ProfileSyncServiceMock
+   fun:NiceMock
+   fun:TestingProfile::GetProfileSyncService
+   fun:Profile::IsSyncAccessible
+   fun:Browser::UpdateCommandsForFullscreenMode
+   fun:Browser::InitCommandState
+   fun:Browser
+   fun:BrowserWithTestWindowTest::SetUp
+}