Fix up leak in FilePathWatcherTest and UserStyleSheetTest

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 # running overnight and removing outdated bugs/suppressions.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 4009 matching lines @@
 {
    bug_76490
    Memcheck:Cond
    fun:_ZN7WebCore7Element15removeAttributeERKN3WTF6StringERi
    fun:_ZN7WebCore19DatasetDOMStringMap10deleteItemERKN3WTF6StringERi
    fun:_ZN7WebCore14V8DOMStringMap20namedPropertyDeleterEN2v85LocalINS1_6StringEEERKNS1_12AccessorInfoE
    fun:_ZN2v88internal8JSObject29DeletePropertyWithInterceptorEPNS0_6StringE
    obj:*
 }
 {
-   bug_76644
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN40UserStyleSheetWatcherTest_StyleLoad_Test8TestBodyEv
-   fun:_ZN7testing8internal38HandleSehExceptionsInMethodIfSupportedINS_4TestEvEET0_PT_MS4_FS3_vEPKc
-   fun:_ZN7testing8internal35HandleExceptionsInMethodIfSupportedINS_4TestEvEET0_PT_MS4_FS3_vEPKc
-}
-{
    bug_76647
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN11webkit_glue18BufferedDataSource20CreateResourceLoaderExx
    fun:_ZN11webkit_glue18BufferedDataSource14InitializeTaskEv
    fun:_Z16DispatchToMethodIN11webkit_glue18BufferedDataSourceEMS1_FvvEEvPT_T0_RK6Tuple0
    fun:_ZN14RunnableMethodIN11webkit_glue18BufferedDataSourceEMS1_FvvE6Tuple0E3RunEv
    fun:_ZN11MessageLoop7RunTaskEP4Task
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base16MessagePumpForUI17RunWithDispatcherEPNS_11MessagePump8DelegateEPNS0_10DispatcherE
    fun:_ZN4base16MessagePumpForUI3RunEPNS_11MessagePump8DelegateE
    fun:_ZN11MessageLoop11RunInternalEv
    fun:_ZN11MessageLoop10RunHandlerEv
 }
 {
-   bug_77042
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN4base16MessageLoopProxy22CreateForCurrentThreadEv
-   fun:_ZN19ServiceProcessState10InitializeEv
-   fun:_ZN39ServiceProcessStateFileManipulationTest5SetUpEv
-}
-{
    bug_77049
    Memcheck:Cond
    fun:_ZN7WebCore8Gradient20sortStopsIfNecessaryEv
    fun:_ZN7WebCore8Gradient16platformGradientEv
    fun:_ZN7WebCore15GraphicsContext*EPNS_8GradientE
    fun:_ZN7WebCore15GraphicsContext*EN3WTF10PassRefPtrINS_8GradientEEE
    fun:_ZN7WebCore25RenderSVGResourceGradient13applyResourceEPNS_12RenderObjectEPNS_11RenderStyleERPNS_15GraphicsContextEt
 }
 {
    bug_77258_a
@@ skipping 169 matching lines @@
 }
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
    fun:call_init
    fun:_dl_init
 }