Suppress both leaks mentioned in bug16625 on both mac and linux....

tools/valgrind/memcheck/suppressions.txt

 # There are three 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 # running overnight and removing outdated bugs/suppressions.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 887 matching lines @@
    fun:_Znwj
    fun:_ZN10URLFetcherC1ERK4GURLNS_11RequestTypeEPNS_8DelegateE
    fun:_ZN22AlternateNavURLFetcher7ObserveE16NotificationTypeRK18NotificationSourceRK19NotificationDetails
    fun:_ZN19NotificationService6NotifyE16NotificationTypeRK18NotificationSourceRK19NotificationDetails
    fun:_ZN20NavigationController9LoadEntryEP15NavigationEntry
    fun:_ZN20NavigationController7LoadURLERK4GURLS2_j
    fun:_ZN7Browser14OpenURLAtIndexEP11TabContentsRK4GURLS4_21WindowOpenDispositionjib
    fun:_ZN7Browser14OpenCurrentURLEv
 }
 {
+   # 1 in 40 runs?  Handle both leaks with one suppression.
+   # Anonymous namespaces are encoded differently on mac and linux,
+   # hence the wildcard.
+   bug_16625
+   Memcheck:Leak
+   fun:_ZN16ChildProcessHost13CreateChannelEv
+   fun:_ZN18UtilityProcessHost12StartProcessERK8FilePath
+   fun:_ZN18UtilityProcessHost22StartExtensionUnpackerERK8FilePath
+   fun:*UtilityProcessHostTest_ExtensionUnpacker_Test8TestBodyEv
+}
+{
    # 1 in 20 runs?
    bug_16908
    Memcheck:Leak
    fun:_Znwj
    fun:_ZN7WebCore9CSSParser22createFloatingSelectorEv
    fun:_Z10cssyyparsePv
    fun:_ZN7WebCore9CSSParser10parseSheetEPNS_13CSSStyleSheetERKNS_6StringE
    fun:_ZN7WebCore13CSSStyleSheet11parseStringERKNS_6StringEb
    fun:_ZN7WebCoreL12parseUASheetERKNS_6StringE
    fun:_ZN7WebCoreL12parseUASheetEPKcj
    fun:_ZN7WebCoreL22loadSimpleDefaultStyleEv
    fun:_ZN7WebCore16CSSStyleSelectorC1EPNS_8DocumentERKNS_6StringEPNS_14StyleSheetListEPNS_13CSSStyleSheetEbb
    fun:_ZN7WebCore8Document6attachEv
    fun:_ZN7WebCore5Frame11setDocumentEN3WTF10PassRefPtrINS_8DocumentEEE
    fun:_ZN7WebCore11FrameLoader5beginERKNS_4KURLEbPNS_14SecurityOriginE
    fun:_ZN7WebCore11FrameLoader4initEv
    fun:_ZN7WebCore5Frame4initEv
 }