Add four new suppressions, widen one.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 24771)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -846,8 +846,6 @@
    fun:_ZN11webkit_glue20ResourceLoaderBridge6CreateERKSsRK4GURLS5_S5_S2_S2_S2_iiN12ResourceType4TypeEii
    fun:_ZN11webkit_glue16WebURLLoaderImpl7Context5StartERKN6WebKit13WebURLRequestEPNS_20ResourceLoaderBridge16SyncLoadResponseE
    fun:_ZN11webkit_glue16WebURLLoaderImpl18loadAsynchronouslyERKN6WebKit13WebURLRequestEPNS1_18WebURLLoaderClientE
-   fun:_ZN11webkit_glue15ResourceFetcher5StartEP8WebFrame
-   fun:_ZN11webkit_glue15ResourceFetcherC1ERK4GURLP8WebFrameP14CallbackRunnerI6Tuple2IRKN6WebKit14WebURLResponseERKSsEE
 }
 {
    bug_17185
@@ -871,6 +869,16 @@
    fun:_ZN7WebCore10Pasteboard10writeImageEPNS_4NodeERKNS_4KURLERKNS_6StringE
 }
 {
+   bug_17291
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10fastMallocE*
+   fun:_ZN7WebCore19V8EventListenerList3addEPNS_15V8EventListenerE
+   fun:_ZN7WebCore19V8EventListenerList19findOrCreateWrapperINS_15V8EventListenerEEEN3WTF10PassRefPtrIS2_EEPNS_5FrameEN2v85LocalINS8_5ValueEEEb
+   fun:_ZN7WebCore8V8Custom37v8DOMWindowEventHandlerAccessorSetterEN2v85LocalINS1_6StringEEENS2_INS1_5ValueEEERKNS1_12AccessorInfoE
+   fun:_ZN2v88internal8JSObject23SetPropertyWithCallbackEPNS0_6ObjectEPNS0_6StringES3_PS1_
+}
+{
    # also bug 17979.  It's a nest of leaks.
    bug_17385
    Memcheck:Leak