Fix leaks in MediaGalleriesPreferencesTest.*

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 # running overnight and removing outdated bugs/suppressions.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 5811 matching lines @@
    fun:_ZN16ReloadButtonTestC2Ev
 }
 {
    bug_141255
    Memcheck:Leak
    ...
    fun:_ZN6policy22BrowserPolicyConnector22CreatePlatformProviderEv
    fun:_ZN6policy22BrowserPolicyConnector4InitEv
    fun:_ZN21TestingBrowserProcess24browser_policy_connectorEv
 }
-{
-   bug_141322_a
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN10extensions16SettingsFrontendC1ERK13scoped_refptrINS_22SettingsStorageFactoryEEP7Profile
-   fun:_ZN10extensions16SettingsFrontend6CreateEP7Profile
-   fun:_ZN16ExtensionServiceC1EP7ProfilePK11CommandLineRK8FilePathPN10extensions14ExtensionPrefsEbb
-   fun:_ZN10extensions19TestExtensionSystem22CreateExtensionServiceEPK11CommandLineRK8FilePathb
-   fun:_ZN6chrome12_GLOBAL__N_129MediaGalleriesPreferencesTest5SetUpEv
-}
-{
-   bug_141322_b
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN16ExtensionServiceC1EP7ProfilePK11CommandLineRK8FilePathPN10extensions14ExtensionPrefsEbb
-   fun:_ZN10extensions19TestExtensionSystem22CreateExtensionServiceEPK11CommandLineRK8FilePathb
-   fun:_ZN6chrome12_GLOBAL__N_129MediaGalleriesPreferencesTest5SetUpEv
-}
 
 #-----------------------------------------------------------------------
 # 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
 }