Suppress a leak in AutomationProxyTest.AcceleratorHistory (issue 123307)

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 # running overnight and removing outdated bugs/suppressions.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 5747 matching lines @@
    bug_122752b
    Memcheck:Unaddressable
    fun:_ZN6WebKit12CCThreadImpl8postTaskEN3WTF10PassOwnPtrIN7WebCore8CCThread4TaskEEE
    fun:_ZN7WebCore13CCThreadProxy14setNeedsCommitEv
    fun:_ZN7WebCore15CCLayerTreeHost14setNeedsCommitEv
    fun:_ZN7WebCore13LayerChromium14setNeedsCommitEv
    fun:_ZN7WebCore13LayerChromium11removeChildEPS0_
    fun:_ZN7WebCore13LayerChromium16removeFromParentEv
    fun:_ZN7WebCore21GraphicsLayerChromium16removeFromParentEv
 }
+{
+   bug_123307
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10fastMallocEm
+   fun:_ZN3WTF16fastZeroedMallocEm
+   ...
+   fun:_ZN7WebCore12_GLOBAL__N_111V8ObjectMapIN2v86ObjectEjE3setERKNS2_6HandleIS3_EERKj
+   fun:_ZN7WebCore12_GLOBAL__N_110Serializer10greyObjectERKN2v86HandleINS2_6ObjectEEE
+   fun:_ZN7WebCore12_GLOBAL__N_110Serializer11doSerializeEN2v86HandleINS2_5ValueEEEPNS1_9StateBaseE
+   fun:_ZN7WebCore12_GLOBAL__N_110Serializer9serializeEN2v86HandleINS2_5ValueEEE
+   fun:_ZN7WebCore21SerializedScriptValueC1EN2v86HandleINS1_5ValueEEEPN3WTF6VectorINS5_6RefPtrINS_11MessagePortEEELm1EEEPNS6_INS7_INS5_11ArrayBufferEEELm1EEERb
+   fun:_ZN7WebCore21SerializedScriptValue6createEN2v86HandleINS1_5ValueEEEPN3WTF6VectorINS5_6RefPtrINS_11MessagePortEEELm1EEEPNS6_INS7_INS5_11ArrayBufferEEELm1EEERb
+   fun:_ZN7WebCoreL25handlePostMessageCallbackERKN2v89ArgumentsEb
+   fun:_ZN7WebCore11V8DOMWindow19postMessageCallbackERKN2v89ArgumentsE
+   fun:_ZN2v88internalL19HandleApiCallHelperILb0EEEPNS0_11MaybeObjectENS0_12_GLOBAL__N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE
+   fun:_ZN2v88internalL21Builtin_HandleApiCallENS0_12_GLOBAL__N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
@@ skipping 10 matching lines @@
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }