Fix an unitialized read in a unit test to appease valgrind

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 # running overnight and removing outdated bugs/suppressions.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 671 matching lines @@
    ...
    fun:_ZN3net18TestServerLauncher16LoadTestRootCertEv
 }
 {
    # uitest's ResourceDispatcherTest.CrossSiteAfterCrash crashes on purpose
    Intentional_crash
    Memcheck:Addr4
    fun:_ZN12AboutHandler10AboutCrashEv
 }
 {
-   # Valgrind gives false positive on initialized fields in
-   # BufferedResourceLoader::RestartLoadingTask().
-   # see https://bugs.kde.org/show_bug.cgi?id=243992
-   valgrind_bug_243992
-   Memcheck:Cond
-   fun:_ZN11webkit_glue22BufferedResourceLoader20DisableDeferIfNeededEv
-   fun:_ZN11webkit_glue22BufferedResourceLoader13SetAllowDeferEb
-   fun:_ZN11webkit_glue18BufferedDataSource18RestartLoadingTaskEv
-   ...
-}
-{
-   # Very similar to the above bug, but in WatchDogTask().
-   # see https://bugs.kde.org/show_bug.cgi?id=243992
-   valgrind_bug_243992b
-   Memcheck:Cond
-   fun:_ZN11webkit_glue22BufferedResourceLoader20DisableDeferIfNeededEv
-   ...
-   fun:_ZN11webkit_glue18BufferedDataSource12WatchDogTaskEv
-}
-{
    # 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
@@ skipping 2997 matching lines @@
    Memcheck:Value4
    fun:modp_b64_encode
    fun:_ZN4base12Base64EncodeERKSsPSs
    fun:_ZN3net14HttpAuthGSSAPI17GenerateAuthTokenEPKSbIwSt11char_traitsIwESaIwEES6_RS5_PSs
    ...
    fun:_ZN3net24HttpAuthHandlerNegotiate6DoLoopEi
    fun:_ZN3net24HttpAuthHandlerNegotiate21GenerateAuthTokenImplEPKSbIwSt11char_traitsIwESaIwEES6_PKNS_15HttpRequestInfoEP14CallbackRunnerI6Tuple1IiEEPSs
    fun:_ZN3net15HttpAuthHandler17GenerateAuthTokenEPKSbIwSt11char_traitsIwESaIwEES6_PKNS_15HttpRequestInfoEP14CallbackRunnerI6Tuple1IiEEPSs
    fun:_ZN3net46HttpAuthHandlerNegotiateTest_DisableCname_Test8TestBodyEv
 }