Refactor the suppression rule for Bug 42942

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 69515)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -1983,7 +1983,7 @@
    fun:_ZN7WebCore8V8Worker19constructorCallbackERKN2v89ArgumentsE
 }
 {
-   bug_42942
+   bug_42942_a
    Memcheck:Leak
    fun:_Znw*
    ...
@@ -1995,6 +1995,18 @@
    fun:_ZN3net13CookieMonster9InitStoreEv
 }
 {
+   bug_42942_b
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN3sql10Connection18GetCachedStatementERKNS_11StatementIDEPKc
+   fun:_ZN3sql9MetaTable19PrepareSetStatementEPNS_9StatementEPKc
+   fun:_ZN3sql9MetaTable8SetValueEPKci
+   fun:_ZN3sql9MetaTable16SetVersionNumberEi
+   ...
+   fun:_ZN3net13CookieMonster9InitStoreEv
+}
+{
    bug_42958_a
    Memcheck:Leak
    fun:malloc
@@ -2512,32 +2524,6 @@
    fun:_ZN10URLFetcher4Core15StartURLRequestEv
 }
 {
-   bug_56359_b
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN3sql10Connection18GetUniqueStatementEPKc
-   fun:_ZN3sql10Connection18GetCachedStatementERKNS_11StatementIDEPKc
-   fun:_ZN3sql9MetaTable19PrepareSetStatementEPNS_9StatementEPKc
-   fun:_ZN3sql9MetaTable8SetValueEPKci
-   fun:_ZN3sql9MetaTable16SetVersionNumberEi
-   fun:_ZN3sql9MetaTable4InitEPNS_10ConnectionEii
-   fun:_ZN27SQLitePersistentCookieStore21EnsureDatabaseVersionEPN3sql10ConnectionE
-   fun:_ZN27SQLitePersistentCookieStore4LoadEPSt6vectorIPN3net13CookieMonster15CanonicalCookieESaIS4_EE
-   fun:_ZN3net13CookieMonster9InitStoreEv
-   fun:_ZN3net13CookieMonster15InitIfNecessaryEv
-   fun:_ZN3net13CookieMonster21GetCookiesWithOptionsERK4GURLRKNS_13CookieOptionsE
-   fun:_ZN17URLRequestHttpJob24OnCanGetCookiesCompletedEi
-   fun:_ZN17URLRequestHttpJob23AddCookieHeaderAndStartEv
-   fun:_ZN17URLRequestHttpJob5StartEv
-   fun:_ZN10URLRequest8StartJobEP13URLRequestJob
-   fun:_ZN10URLRequest5StartEv
-   fun:_ZN10URLFetcher4Core15StartURLRequestEv
-   fun:_Z16DispatchToMethodIN10URLFetcher4CoreEMS1_FvvEEvPT_T0_RK6Tuple0
-   fun:_ZN14RunnableMethodIN10URLFetcher4CoreEMS1_FvvE6Tuple0E3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
-   fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
-}
-{
    bug_51153
    Memcheck:Leak
    ...