Valgrind: Suppress memory errors from the V8 3.3.9.3 upgrade.

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 # running overnight and removing outdated bugs/suppressions.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 4598 matching lines @@
 }
 {
    bug_83609
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base4BindIMN12_GLOBAL__N_118TaskClosureAdapterEFvvEPS2_EENS_8internal20InvokerStorageHolderINS6_15InvokerStorage1IT_T0_EEEES9_RKSA_
    fun:_ZN11MessageLoop15PostDelayedTaskERKN15tracked_objects8LocationEP4Taskx
    fun:_ZN13BrowserThread14PostTaskHelperENS_2IDERKN15tracked_objects8LocationEP4Taskxb
    fun:_ZN13BrowserThread8PostTaskENS_2IDERKN15tracked_objects8LocationEP4Task
 }
+{
+   bug_83626a
+   Memcheck:Cond
+   fun:_ZNK2v88internal9SparseSet8ContainsEi
+   fun:_ZN2v88internal9SparseSet3AddEi
+   ...
+   fun:_ZN2v88internal20HGlobalValueNumberer41CollectSideEffectsOnPathsToDominatedBlockEPNS0_11HBasicBlockES3_
+   fun:_ZN2v88internal20HGlobalValueNumberer12AnalyzeBlockEPNS0_11HBasicBlockEPNS0_9HValueMapE
+}
+{
+   bug_83626b
+   Memcheck:Value4
+   fun:_ZNK2v88internal9SparseSet8ContainsEi
+   fun:_ZN2v88internal9SparseSet3AddEi
+   ...
+   fun:_ZN2v88internal20HGlobalValueNumberer41CollectSideEffectsOnPathsToDominatedBlockEPNS0_11HBasicBlockES3_
+   fun:_ZN2v88internal20HGlobalValueNumberer12AnalyzeBlockEPNS0_11HBasicBlockEPNS0_9HValueMapE
+}
 #-----------------------------------------------------------------------
 # 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
 }