Widen a couple suppressions, add a few more....

tools/valgrind/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 # running overnight and removing outdated bugs/suppressions.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 608 matching lines @@
    fun:g_slice_alloc0
    fun:g_type_create_instance
    fun:g_object_constructor
    fun:g_object_newv
    fun:g_object_new_valist
    fun:g_object_new
    fun:gtk_event_box_new
    fun:_ZN6TabGtkC1EPNS_11TabDelegateE
    fun:_ZN11TabStripGtk13TabInsertedAtEP11TabContentsib
    fun:_ZN13TabStripModel19InsertTabContentsAtEiP11TabContentsbb
-   fun:_ZN13TabStripModel14AddTabContentsEP11TabContentsibjb
 }
 {
    # very common in ui tests
    bug_16089
    Memcheck:Leak
    fun:*
    fun:_ZN4base22LinuxDynamicThreadPool8PostTaskEP4Task
    fun:_ZN10WorkerPool8PostTaskERKN15tracked_objects8LocationEP4Taskb
    fun:_ZN3net12HostResolver3Job5StartEv
 }
@@ skipping 19 matching lines @@
    # very common in ui tests
    bug_16092b
    Memcheck:Leak
    fun:*
    fun:_ZNSt11_Deque_baseIN11MessageLoop11PendingTaskESaIS1_EE17_M_initialize_mapEj
    fun:_ZN11MessageLoopC1ENS_4TypeE
    fun:_ZN4base6Thread10ThreadMainEv
 }
 {
    # very common in ui tests
+   # two different leaks here, one common, one uncommon.
    bug_16093
    Memcheck:Leak
    ...
-   fun:getaddrinfo
    fun:_ZN3netL16HostResolverProcERKSsPP8addrinfo
    fun:_ZN3netL15ResolveAddrInfoEPNS_10HostMapperERKSsPP8addrinfo
    fun:_ZN3net12HostResolver3Job8DoLookupEv
 }
 {
    # very common in ui tests
    bug_16095
    Memcheck:Leak
    ...
    fun:_ZN11MessageLoop21AddToDelayedWorkQueueERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
 }
 {
    # very common in ui tests
    bug_16096
    Memcheck:Leak
    fun:_Znwj
    fun:_ZNSs4_Rep9_S_createEjjRKSaIcE
    fun:_ZNSs4_Rep8_M_cloneERKSaIcEj
    fun:_ZNSs7reserveEj
    fun:_ZNSs6appendEPKcj
    fun:_Z14StringAppendVTISsEvPT_PKNS0_10value_typeEPc
    fun:_Z13StringAppendVPSsPKcPc
    fun:_Z12StringPrintfPKcz
    fun:_ZN12_GLOBAL__N_112WorkerThread10ThreadMainEv
 }
+{
+   # Somewhat common in ui tests.  See also bug 9245.
+   bug_16102
+   Memcheck:Leak
+   fun:realloc
+   fun:FcPatternObjectInsertElt
+   fun:FcConfigPatternAdd
+   fun:FcConfigSubstituteWithPat
+   fun:FcFontRenderPrepare
+   fun:FcFontSetMatch
+   fun:FcFontMatch
+}
+{
+   bug_16103
+   Memcheck:Leak
+   fun:_Znwj
+   fun:_ZN20ShownSectionsHandler22HandleGetShownSectionsEPK5Value
+   fun:_ZN12CallbackImplI20ShownSectionsHandlerMS0_FvPK5ValueE6Tuple1IS3_EE13RunWithParamsERKS7_
+   fun:_ZN5DOMUI19ProcessDOMUIMessageERKSsS1_ib
+   fun:_ZN11TabContents19ProcessDOMUIMessageERKSsS1_ib
+}
+{
+   bug_16104
+   Memcheck:Leak
+   fun:_Znwj
+   fun:_ZN7history20VisitSegmentDatabase17QuerySegmentUsageERKN4base4TimeEiPSt6vectorIP13PageUsageDataSaIS7_EE
+   fun:_ZN7history14HistoryBackend24QueryTopURLsAndRedirectsE13scoped_refptrI18CancelableRequest1I14CallbackRunnerI6Tuple2IPSt6vectorI4GURLSaIS6_EEPSt3mapIS6_S1_I16RefCountedVectorIS6_EESt4lessIS6_ESaISt4pairIKS6_SD_EEEEES4_IS8_SK_EEEi
+}