[MemSheriff] Widen another suppression for script state.

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 # running overnight and removing outdated bugs/suppressions.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 6279 matching lines @@
    fun:_ZN4base17MD5DigestToBase16ERKNS_9MD5DigestE
    fun:_ZN7content16WebKitTestRunner17CaptureDumpPixelsERK8SkBitmap
 }
 {
    bug_364821
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF10fastMallocEm
    fun:_ZN3WTF10RefCountedIN7WebCore11ScriptStateEEnwEm
    fun:_ZN7WebCore11ScriptState6createEN2v86HandleINS1_7ContextEEEN3WTF10PassRefPtrINS_15DOMWrapperWorldEEE
-   fun:_ZN7WebCore22WorkerScriptController25initializeContextIfNeededEv
    ...
    fun:_ZN7WebCore12WorkerThread12workerThreadEv
    fun:_ZN7WebCore12WorkerThread17workerThreadStartEPv
    fun:_ZN3WTFL16threadEntryPointEPv
    fun:_ZN3WTFL19wtfThreadEntryPointEPv
 }
 {
    bug_365258
    Memcheck:Leak
    fun:malloc
@@ skipping 184 matching lines @@
    fun:_Znw*
    fun:_ZN7content27ServiceWorkerContextWrapperC1EPNS_14BrowserContextE
    fun:_ZN7content20StoragePartitionImpl6CreateEPNS_14BrowserContextEbRKN4base8FilePathE
    fun:_ZN7content23StoragePartitionImplMap3GetERKSsS2_b
    fun:_ZN7content12_GLOBAL__N_129GetStoragePartitionFromConfigEPNS_14BrowserContextERKSsS4_b
    fun:_ZN7content14BrowserContext19GetStoragePartitionEPS0_PNS_12SiteInstanceE
    fun:_ZN7content14BrowserContext26GetDefaultStoragePartitionEPS0_
    fun:_ZN7content21ShellBrowserMainParts21PreMainMessageLoopRunEv
    fun:_ZN7content15BrowserMainLoop21PreMainMessageLoopRunEv
 }