Expand suppression for valgrind.

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 # running overnight and removing outdated bugs/suppressions.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 1044 matching lines @@
    fun:_ZdlPv
    fun:_ZN7WebCore15CSSSelectorList19adoptSelectorVectorERN3WTF6VectorIPNS_11CSSSelectorELj0EEE
    fun:_ZN7WebCore9CSSParser15createStyleRuleEPN3WTF6VectorIPNS_11CSSSelectorELj0EEE
    fun:_Z10cssyyparsePv
    fun:_ZN7WebCore9CSSParser10parseSheetEPNS_13CSSStyleSheetERKNS_6StringE
 }
 {
    bug_26216
    Memcheck:Leak
    fun:_Znw*
+   ...
    fun:_ZN9Extension25LoadExtensionActionHelperEPK15DictionaryValuePSs
    fun:_ZN39ExtensionTest_LoadPageActionHelper_Test8TestBodyEv
 }
 {
    bug_26966
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF10fastMallocEj
    fun:_ZN7WebCore10StringImpl19createUninitializedEjRPt
    fun:_ZN7WebCore10StringImpl6createEPKcj
@@ skipping 35 matching lines @@
    fun:_ZN3WTF14ThreadSpecificIN7WebCore16ThreadGlobalDataEEcvPS2_Ev
    fun:_ZN3WTF14ThreadSpecificIN7WebCore16ThreadGlobalDataEEdeEv
    fun:_ZN7WebCore16threadGlobalDataEv
    fun:_ZN7WebCore10StringImpl5emptyEv
    fun:_ZN7WebCore12AtomicString3addEPKc
    fun:_ZN7WebCore12AtomicStringC1EPKc
    fun:_ZN7WebCore12AtomicString4initEv
    fun:_ZN6WebKit10initializeEPNS_12WebKitClientE
    fun:_ZN12RenderThread23EnsureWebKitInitializedEv
 }