GTK: Fix valgrind errors in previous wmclass patch.

tools/valgrind/memcheck/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 # running overnight and removing outdated bugs/suppressions.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 4423 matching lines @@
    fun:_Znw*
    fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
    fun:_ZN4base64_GLOBAL__N_base_threading_worker_pool_posix.cc_*WorkerPoolImpl8PostTaskERKN15tracked_objects8LocationEP4Taskb
    fun:_ZN4base10WorkerPool8PostTaskERKN15tracked_objects8LocationEP4Taskb
    fun:_ZN3net10FileStream12AsyncContext18InitiateAsyncWriteEiPKciP14CallbackRunnerI6Tuple1IiEE
    fun:_ZN3net10FileStream5WriteEPKciP14CallbackRunnerI6Tuple1IiEE
    fun:_ZN7fileapi18FileWriterDelegate5WriteEv
    fun:_ZN7fileapi18FileWriterDelegate14OnDataReceivedEi
 }
 {
-   bug_80282
-   Memcheck:Addr1
-   ...
-   fun:gtk_window_set_wmclass
-   fun:_ZN16BrowserWindowGtk4InitEv
-   fun:_ZN13BrowserWindow19CreateBrowserWindowEP7Browser
-   fun:_ZN7Browser19CreateBrowserWindowEv
-   fun:_ZN7Browser17InitBrowserWindowEv
-   fun:_ZN7Browser12CreateForAppERKSsRKN3gfx4SizeEP7Profileb
-   fun:_ZN7Browser21OpenApplicationWindowEP7ProfilePK9ExtensionN14extension_misc15LaunchContainerERK4GURLPPS_
-   fun:_ZN7Browser21OpenAppShortcutWindowEP7ProfileRK4GURLb
-   fun:_ZN11BrowserInit17LaunchWithProfile21OpenApplicationWindowEP7Profile
-   fun:_ZN11BrowserInit17LaunchWithProfile6LaunchEP7ProfileRKSt6vectorI4GURLSaIS4_EEb
-   fun:_ZN11BrowserInit13LaunchBrowserERK11CommandLineP7ProfileRK8FilePathbPi
-   fun:_ZN11BrowserInit18ProcessCmdLineImplERK11CommandLineRK8FilePathbP7ProfilePiPS_
-   fun:_ZN11BrowserInit5StartERK11CommandLineRK8FilePathP7ProfilePi
-   fun:_Z11BrowserMainRK18MainFunctionParams
-}
-{
    bug_80284
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7fileapi21FileSystemPathManagerC2E13scoped_refptrIN4base16MessageLoopProxyEERK8FilePathS1_IN5quota20SpecialStoragePolicyEEbb
    fun:_ZN7fileapi21FileSystemPathManagerC1E13scoped_refptrIN4base16MessageLoopProxyEERK8FilePathS1_IN5quota20SpecialStoragePolicyEEbb
    fun:_ZN7fileapi12_GLOBAL__N_130FileSystemDirURLRequestJobTest5SetUpEv
 }
 
 #-----------------------------------------------------------------------
 # These only occur on our Google workstations
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
    fun:exit
 }
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
    fun:call_init
    fun:_dl_init
 }