Valgrind: Update a suppression.

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 # running overnight and removing outdated bugs/suppressions.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 5287 matching lines @@
 {
    bug_298143
    Memcheck:Uninitialized
    ...
    fun:_ZN5blink25TypeConversionsV8Internal*AttributeGetterE*
 }
 {
    bug_298788
    Memcheck:Leak
    fun:_Znw*
-   fun:_ZN10extensions19TestExtensionSystem22CreateExtensionServiceEPK11CommandLineRKN4base8FilePathEb
+   fun:_ZN10extensions19TestExtensionSystem22CreateExtensionServiceEPKN4base11CommandLineERKNS1_8FilePathEb
    fun:_ZN10extensions12_GLOBAL__N_130ExtensionActionIconFactoryTest5SetUpEv
 }
 {
    bug_298887
    Memcheck:Leak
    ...
    fun:_ZN2ui25KeyboardCodeFromXKeyEventEP7_XEvent
    fun:_ZN2ui22KeyboardCodeFromNativeERKP7_XEvent
    fun:_ZN12_GLOBAL__N_121XModifierStateWatcher20UpdateStateFromEventERKP7_XEvent
    fun:_ZN2ui20EventFlagsFromNativeERKP7_XEvent
@@ skipping 950 matching lines @@
 }
 {
    bug_400547
    Memcheck:Uninitialized
    fun:_ZNK5blink22GraphicsLayerDebugInfo17appendOwnerNodeIdEPNS_10JSONObjectE
    fun:_ZNK5blink22GraphicsLayerDebugInfo19appendAsTraceFormatEPNS_9WebStringE
    fun:_ZNK7content15TracedDebugInfo19AppendAsTraceFormatEPSs
    fun:_ZNK2cc9LayerImpl11AsValueIntoEPN4base5debug11TracedValueE
    fun:_ZNK2cc*LayerImpl11AsValueIntoEPN4base5debug11TracedValueE
 }