Valgrind: Suppress a leak in HostContentSettingsMap.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index d0f2db6343ec98f0ee93e0e07edd8c898c585388..249c08a26b8d701f0ba9b615332f876a5203d5d4 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -5219,6 +5219,15 @@
    fun:_ZN8chromeos18LowBatteryObserver12PowerChangedERKNS_17PowerSupplyStatusE
    fun:_ZN8chromeos26PowerManagerClientStubImpl6UpdateEv
 }
+{
+   bug_104775
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN4base5Value18CreateIntegerValueEi
+   fun:_ZN22HostContentSettingsMap24SetDefaultContentSettingE19ContentSettingsType14ContentSetting
+   fun:_ZN14CookieSettings23SetDefaultCookieSettingE14ContentSetting
+   fun:_ZN60ExtensionSpecialStoragePolicyTest_HasSessionOnlyOrigins_Test8TestBodyEv
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations