Add two ui_test valgrind suppressions, fix one old one

tools/valgrind/suppressions.txt

 {
    Uninitialized value in deflate
    Memcheck:Cond
    fun:longest_match
    fun:deflate_slow
    fun:MOZ_Z_deflate
 }
 {
    gtk developers don't like cleaning up one-time leaks.  See http://mail.gnome.org/archives/gtk-devel-list/2004-April/msg00230.html
    Memcheck:Leak
@@ skipping 485 matching lines @@
 {
    # See http://crbug.com/11116
    bug_11116a
    Memcheck:Leak
    fun:_Znwj
    fun:_ZN11ChildThread21OnProcessFinalReleaseEv
 }
 {
    # See http://crbug.com/11116
    bug_11116b
+   Memcheck:Leak
    fun:_Znwj
    fun:_ZN11ChildThread14OnChannelErrorEv
    fun:_ZN3IPC12ChannelProxy7Context15OnDispatchErrorEv
 }
 {
    # See http://crbug.com/11117
    bug_11117
    Memcheck:Leak
    fun:_Znwj
    fun:_ZN3IPC12ChannelProxy4SendEPNS_7MessageE
    ...
    fun:_ZN24RendererWebKitClientImpl24suddenTerminationChangedEb
 }
+{
+   # See http://crbug.com/11139
+   bug_11139
+   Memcheck:Leak
+   fun:_Znwj
+   fun:_ZN14ProcessWatcher23EnsureProcessTerminatedEi
+}
+{
+   # See http://crbug.com/11144
+   # This suppression is loose enough to match at least two message leaks
+   bug_11144
+   Memcheck:Leak
+   fun:_Znwj
+   fun:_ZN3IPC12ChannelProxy4SendEPNS_7MessageE
+   fun:_ZN3IPC11SyncChannel15SendWithTimeoutEPNS_7MessageEi
+   fun:_ZN3IPC11SyncChannel4SendEPNS_7MessageE
+   fun:_ZN11ChildThread4SendEPN3IPC7MessageE
+   fun:_ZN12RenderThread4SendEPN3IPC7MessageE
+}