Fix memory leak in xkeyboard.cc.

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 # running overnight and removing outdated bugs/suppressions.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 5193 matching lines @@
    fun:_ZN4base8internal8Invoker1ILb0ENS0_15InvokerStorage1IM17PluginLoaderPosixFvvE13scoped_refptrIS3_EEES5_E8DoInvokeEPNS0_18InvokerStorageBaseE
 }
 {
    bug_103192
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN13PluginService10GetPluginsERKN4base8CallbackIFvRKSt6vectorIN6webkit13WebPluginInfoESaIS4_EEEEE
    fun:_ZN8chromeos12_GLOBAL__N_127GViewRequestInterceptorTest5SetUpEv
 }
 {
-   bug_103433
-   Memcheck:Leak
-   fun:malloc
-   ...
-   fun:XGetAtomName
-   fun:_ZN8chromeos12input_method9XKeyboard14GetNumLockMaskEv
-}
-{
    bug_103467
    Memcheck:Cond
    fun:_ZNK7WebCore12NamedNodeMap20mappedMapsEquivalentEPKS0_
    fun:_ZNK7WebCore16CSSStyleSelector24canShareStyleWithElementEPNS_4NodeE
    fun:_ZNK7WebCore16CSSStyleSelector26findSiblingForStyleSharingEPNS_4NodeERj
 }
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 {
@@ skipping 23 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }