gtk: Two fixes for the tab leak:...

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 # running overnight and removing outdated bugs/suppressions.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 604 matching lines @@
 }
 {
    # See bug 12539 and 12549
    bug_12539
    Memcheck:Leak
    ...
    fun:_ZN7WebCore11ImageSource18createFrameAtIndexEj
    fun:_ZNK11webkit_glue12ImageDecoder6DecodeEPKhj
 }
 {
-   # very common in ui tests
-   bug_12863
-   Memcheck:Leak
-   fun:malloc
-   fun:g_malloc
-   ...
-   fun:gtk_event_box_new
-   fun:_ZN6TabGtkC1EPNS_11TabDelegateE
-   fun:_ZN11TabStripGtk13TabInsertedAtEP11TabContentsib
-   fun:_ZN13TabStripModel19InsertTabContentsAtEiP11TabContentsbb
-}
-{
    bug_15762
    Memcheck:Cond
    fun:_ZN7testing8internal11CmpHelperEQIjjEENS_15AssertionResultEPKcS4_RKT_RKT0_
    ...
    fun:_ZN39ImageOperations_CreateMaskedBitmap_Test8TestBodyEv
 }
 {
    # very common in ui tests
    bug_16089
    Memcheck:Leak
@@ skipping 343 matching lines @@
    fun:_ZN3IPC7Channel11ChannelImplC1ERKSsNS0_4ModeEPNS0_8ListenerE
    fun:_ZN3IPC7ChannelC2ERKSsNS0_4ModeEPNS0_8ListenerE
    fun:_ZN3IPC7ChannelC1ERKSsNS0_4ModeEPNS0_8ListenerE
    fun:_ZN3IPC12ChannelProxy7Context13CreateChannelERKSsRKNS_7Channel4ModeE
    fun:_ZN3IPC12ChannelProxy4InitERKSsNS_7Channel4ModeEP11MessageLoopb
    fun:_ZN3IPC12ChannelProxyC2ERKSsNS_7Channel4ModeEP11MessageLoopPNS0_7ContextEb
    fun:_ZN3IPC11SyncChannelC2ERKSsNS_7Channel4ModeEPNS3_8ListenerEPNS_12ChannelProxy13MessageFilterEP11MessageLoopbPN4base13WaitableEventE
    fun:_ZN3IPC11SyncChannelC1ERKSsNS_7Channel4ModeEPNS3_8ListenerEPNS_12ChannelProxy13MessageFilterEP11MessageLoopbPN4base13WaitableEventE
    fun:_ZN11ChildThread4InitEv
 }