Removed an outdated v8 valgrind suppression regarding flag handling.

tools/valgrind/memcheck/suppressions.txt

 # There are four 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 # running overnight and removing outdated bugs/suppressions.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 830 matching lines @@
    ...
    fun:_ZN3net10TestServer16LoadTestRootCertEv
 }
 {
    # uitest's ResourceDispatcherTest.CrossSiteAfterCrash crashes on purpose
    Intentional_crash
    Memcheck:Unaddressable
    fun:_ZN12AboutHandler10AboutCrashEv
 }
 {
-   # Minor commandline options leak in v8
-   # See http://code.google.com/p/v8/issues/detail?id=275
-   v8_bug_275
-   Memcheck:Leak
-   fun:_Znaj
-   ...
-   fun:_ZN2v88internal8FlagList18SetFlagsFromStringEPKci
-}
-{
    # Non-joinable thread doesn't clean up all state on program exit
    # very common in ui tests
    bug_16096 (WontFix)
    Memcheck:Leak
    fun:_Znw*
    fun:_ZNSs4_Rep9_S_createE*RKSaIcE
    fun:_ZNSs4_Rep8_M_cloneERKSaIcE*
    fun:_ZNSs7reserveE*
    fun:_ZNSs6appendEPKc*
    fun:*StringAppendV*
@@ skipping 4960 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }