Revert "Suppress valgrind cond/value4 error in PowerMenuButton"

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 # running overnight and removing outdated bugs/suppressions.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 5042 matching lines @@
    fun:_ZN7history8TopSites16SetPageThumbnailERK4GURLPN3gfx5ImageERK14ThumbnailScore
    fun:_ZN7history17ExpireHistoryTest14AddExampleDataEPxPN4base4TimeE
    fun:_ZN7history*ExpireHistoryTest_*
 }
 {
    bug_101781_c
    Memcheck:Cond
    fun:_ZN7testing8internal11CmpHelperGEIddEENS_15AssertionResultEPKcS4_RKT_RKT0_
    fun:_ZN3gfx31JPEGCodec_EncodeDecodeRGBA_Test8TestBodyEv
 }
-{
-   bug_101867_a
-   Memcheck:Cond
-   ...
-   fun:_ZN8chromeos15PowerMenuButton22UpdateIconAndLabelInfoEv
-   fun:_ZN8chromeos15PowerMenuButtonC1EPNS_14StatusAreaHostE
-   fun:_ZN8chromeos14StatusAreaView4InitEv
-   fun:_ZN8chromeos11BrowserView4InitEv
-}
-{
-   bug_101867_b
-   Memcheck:Value4
-   fun:_ZN8chromeos15PowerMenuButton22UpdateIconAndLabelInfoEv
-   fun:_ZN8chromeos15PowerMenuButtonC1EPNS_14StatusAreaHostE
-   fun:_ZN8chromeos14StatusAreaView4InitEv
-   fun:_ZN8chromeos11BrowserView4InitEv
-}
-
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
    fun:exit
@@ skipping 16 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
 }