Suppresses leaks in tracked_objects.

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 # running overnight and removing outdated bugs/suppressions.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 5180 matching lines @@
    fun:_ZN14ProfileManager16OnImportFinishedEP7Profile
    fun:_ZN22ChromeBrowserMainParts25PreMainMessageLoopRunImplEv
 }
 {
    bug_102257
    Memcheck:Cond
    ...
    fun:_ZN2v88internalL6InvokeEbNS0_6HandleINS0_10JSFunctionEEENS1_INS0_6ObjectEEEiPS5_Pb
    fun:_ZN2v88internal9Execution4CallENS0_6HandleINS0_6ObjectEEES4_iPS4_Pbb
 }
+{
+   bug_102327
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN15tracked_objects10ThreadData10InitializeEv
+   fun:_ZN15tracked_objects10ThreadData30InitializeAndSetTrackingStatusEb
+   fun:_ZN15tracked_objects10ThreadData29ShutdownSingleThreadedCleanupEb

[jar (doing other things), 2011/11/01 03:55:15]

This is an excellent example of a race to supress.

This Shutdown... function is *ONLY* called in unit tests, and hence it is
possible that other threads, lingering from previous tests, are racing to see
status as this unit test runs.  As a result, this is an artifact of the unit
test only, and will *NEVER* take place in Chrome (the browser). 

In addition, the examination of status (raced against the setting of status) is
inconsequential, as the code handles any of the status values, in any order,
over time.  Hence any read is old or new values is handled gracefully.

Bottom line: Totally benign race.

Thanks for adding this.

+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
@@ skipping 17 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
 }