Add memcheck annotation and remove suppression.

This is really re-landing 112937 and attempting to avoid a warning from the
Linux builder.

R=jar@chromium.org
BUG=106326
TEST=needs to run on the CQ


Review URL: http://codereview.chromium.org/8796006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112944 0039d316-1c4b-4281-b951-d872f2087c98

base/tracked_objects.cc

@@ -9,6 +9,7 @@
 #include "base/format_macros.h"
 #include "base/message_loop.h"
 #include "base/stringprintf.h"
+#include "base/third_party/valgrind/memcheck.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "base/port.h"
@@ -219,6 +220,8 @@ ThreadData::~ThreadData() {}
 
 void ThreadData::PushToHeadOfList() {
   // Toss in a hint of randomness (atop the uniniitalized value).
+  (void)VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(random_number_,
+                                                 sizeof(random_number_));
   random_number_ += static_cast<int32>(this - static_cast<ThreadData*>(0));
   random_number_ ^= (Now() - TrackedTime()).InMilliseconds();
 

tools/valgrind/memcheck/suppressions.txt

@@ -5322,13 +5322,6 @@
    fun:_ZN7WebCoreL21executeInsertFragmentEPNS_5FrameEN3WTF10PassRefPtrINS_16DocumentFragmentEEE
    fun:_ZN7WebCoreL17executeInsertHTMLEPNS_5FrameEPNS_5EventENS_19EditorCommandSourceERKN3WTF6StringE
 }
-{
-   bug_106326
-   Memcheck:Uninitialized
-   fun:_ZN15tracked_objects9DeathData11RecordDeathEiii
-   fun:_ZN15tracked_objects10ThreadData11TallyADeathERKNS_6BirthsEii
-   fun:_ZN15tracked_objects10ThreadData31TallyRunOnNamedThreadIfTrackingERKN4base12TrackingInfoERKNS_11TrackedTimeES7_
-}
 {
    bug_106331
    Memcheck:Leak