valgrind: Suppress another leak after r152830

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 # running overnight and removing outdated bugs/suppressions.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 5768 matching lines @@
    fun:_ZN8appcache19AppCacheStorageImpl10InitializeERK8FilePathPN4base16MessageLoopProxyES6_
    fun:_ZN8appcache15AppCacheService10InitializeERK8FilePathPN4base16MessageLoopProxyES6_
    fun:_ZN21ChromeAppCacheService20InitializeOnIOThreadERK8FilePathPN7content15ResourceContextE13scoped_refptrIN5quota20SpecialStoragePolicyEE
 }
 {
    bug_144898
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN50PrintSystemTaskProxyTest_DetectDuplexModeCUPS_Test8TestBodyEv
 }
+{
+   bug_144898_b
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN52PrintSystemTaskProxyTest_DetectNoDuplexModeCUPS_Test8TestBodyEv
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
    fun:call_init
    fun:_dl_init
 }
 {
    bug_todo_getdelim2
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }