Remove remaining references to test_shell_tests now that the bots have been updated.

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, 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.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 11 matching lines @@
    # CoreAudio leak.  See http://crbug.com/9351
    bug_9351
    Memcheck:Leak
    ...
    fun:_ZN12HALCADClient19AddPropertyListenerEmPK26AudioObjectPropertyAddressPFlmmS2_PvES3_
    ...
    fun:_ZN9HALSystem16CheckOutInstanceEv
    ...
 }
 {
-   # Mac test_shell_tests.  See http://crbug.com/11134
-   # Doesn't happen on bots, but happens like crazy on the smo
-   # test machine 'caliban'.  Don't delete just because it
-   # doesn't happen on the bots.
-   bug_11134
-   Memcheck:Uninitialized
-   fun:vCMMVectorConvert8BitRGBToRGB
-   fun:_ZNK15CMMConvRGBToRGB7ConvertER8CMM8BitsP14CMMRuntimeInfomm
-}
-{
    # Mac system library bug?  See http://crbug.com/11327
    bug_11327
    Memcheck:Uninitialized
    fun:_ZN19AudioConverterChain5ResetEv
    fun:AudioConverterReset
    obj:/System/Library/Components/CoreAudio.component/Contents/MacOS/CoreAudio
 }
 {
    # Mac system library bug?  See http://crbug.com/11327
    bug_11327b
@@ skipping 2332 matching lines @@
 {
    bug_231969
    Memcheck:Uninitialized
    fun:rangematch
    fun:fnmatch1
    fun:fnmatch1
    fun:fnmatch$UNIX2003
    fun:_ZN9file_util14FileEnumerator4NextEv
    fun:_ZN10disk_cache11SimpleIndex15RestoreFromDiskERKN4base8FilePathE
 }