Valgrind: Widen a couple layout test suppressions.

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 # running overnight and removing outdated bugs/suppressions.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 5598 matching lines @@
    fun:_ZN5blinkL14createResourceENS_8Resource4TypeERKNS_15ResourceRequestERKN3WTF6StringE
    fun:_ZN5blink15ResourceFetcher12loadResourceENS_8Resource4TypeERNS_12FetchRequestERKN3WTF6StringE
    fun:_ZN5blink15ResourceFetcher15requestResourceENS_8Resource4TypeERNS_12FetchRequestE
    fun:_ZN5blink15ResourceFetcher16fetchRawResourceERNS_12FetchRequestE
    fun:_ZN5blink24DocumentThreadableLoader11loadRequestERKNS_15ResourceRequestENS_19SecurityCheckPolicyE
 }
 {
    bug_332335
    Memcheck:Param
    sendmsg(msg.msg_iov[0])
-   fun:sys_sendmsg
+   ...
    fun:_ZN8breakpad12_GLOBAL__N_122NonBrowserCrashHandler11RequestDumpEPKvm
    fun:_ZN15google_breakpad16ExceptionHandler12GenerateDumpEPNS0_12CrashContextE
    fun:_ZN15google_breakpad16ExceptionHandler12HandleSignalEiP7siginfoPv
    fun:_ZN15google_breakpad16ExceptionHandler13SignalHandlerEiP7siginfoPv
 }
 {
    bug_333992
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7content12_GLOBAL__N_123CreateWebFrameTestProxyEPNS_14RenderViewImplEi
@@ skipping 121 matching lines @@
   Memcheck:Uninitialized
   fun:_ZN5blink21RenderLayerCompositor14updateIfNeededEv
 }
 {
    bug_364724
    Memcheck:Param
    write(buf)
    obj:/lib/x86_64-linux-gnu/libpthread-2.15.so
    fun:_ZN3IPC12ChannelPosix23ProcessOutgoingMessagesEv
    fun:_ZN3IPC12ChannelPosix29OnFileCanWriteWithoutBlockingEi
+   ...
    fun:_ZN4base19MessagePumpLibevent21FileDescriptorWatcher29OnFileCanWriteWithoutBlockingEiPS0_
    ...
    fun:event_process_active
    fun:event_base_loop
 }
 {
    bug_364724b
    Memcheck:Uninitialized
    fun:_ZN4base17MD5DigestToBase16ERKNS_9MD5DigestE
    fun:_ZN7content16WebKitTestRunner17CaptureDumpPixelsERK8SkBitmap
@@ skipping 531 matching lines @@
    fun:_ZN2v88internal8JSObject8DeepWalkENS0_6HandleIS1_EEPNS0_29AllocationSiteCreationContextE
    fun:_ZN2v88internal27Runtime_CreateObjectLiteralEiPPNS0_6ObjectEPNS0_7IsolateE
 }
 {
    bug_398349_b
    Memcheck:Uninitialized
    fun:_ZN2v88internal19JSObjectWalkVisitorINS0_26AllocationSiteUsageContextEE13StructureWalkENS0_6HandleINS0_8JSObjectEEE
    fun:_ZN2v88internal8JSObject8DeepCopyENS0_6HandleIS1_EEPNS0_26AllocationSiteUsageContextENS1_13DeepCopyHintsE
    fun:_ZN2v88internal27Runtime_CreateObjectLiteralEiPPNS0_6ObjectEPNS0_7IsolateE
 }