Fix memory errors in ComponentUpdater::ComponentUpdater().

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 95372)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -5178,24 +5178,6 @@
    fun:_ZN8sync_api11SyncManager12SyncInternal4InitERK8FilePathRKN12browser_sync10WeakHandleINS5_14JsEventHandlerEEERKSsibPNS_23HttpPostProviderFactoryEPNS5_24ModelSafeWorkerRegistrarESC_RKNS_15SyncCredentialsEPN13sync_notifier12SyncNotifierESC_b
 }
 {
-   bug_91486_a
-   Memcheck:Leak
-   fun:_Znw*
-   ...
-   fun:_ZN12*ReadManifestERK8FilePath
-   fun:_ZN17ComponentUnpacker*ERKSt6vectorIhSaIhEERK8FilePathP18ComponentInstaller
-}
-{
-   bug_91486_b
-   Memcheck:Free
-   fun:_ZdlPv
-   ...
-   fun:_ZN10scoped_ptrIhED1Ev
-   fun:_ZN12_GLOBAL__N_112CRXValidator*
-   ...
-   fun:_ZN17ComponentUnpackerC1ERKSt6vectorIhSaIhEERK8FilePathP18ComponentInstaller
-}
-{
    bug_91491
    Memcheck:Leak
    fun:_Znw*