Remove suppression for SocketStreamTest.CloseFlushPendingWrite

BUG=51055
TEST=no bug_51055 suppressions used in memory test:net

Review URL: http://codereview.chromium.org/3175029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57027 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -3758,14 +3758,6 @@
    fun:_ZN14WebDataService29InitializeDatabaseIfNecessaryEv
    fun:_Z16DispatchToMethodI14WebDataServiceMS0_FvvEEvPT_T0_RK6Tuple0
 }
-{
-   bug_51055
-   Memcheck:Addr4
-   ...
-   fun:_ZN7testing8internal11CmpHelperEQIN17SocketStreamEvent9EventTypeES3_EENS_15AssertionResultEPKcS6_RKT_RKT0_
-   fun:_ZN7testing8internal8EqHelperILb0EE7CompareIN17SocketStreamEvent9EventTypeES5_EENS_15AssertionResultEPKcS8_RKT_RKT0_
-   fun:_ZN3net44SocketStreamTest_CloseFlushPendingWrite_Test8TestBodyEv
-}
 {
    bug_51057_a
    Memcheck:Leak