Valgrind: Put back suppression for GoogleURLTracker.

BUG=52826
TEST=Valgrind goes green.
TBR=ukai
Review URL: http://codereview.chromium.org/3112026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56961 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -4149,6 +4149,13 @@
    ...
    fun:_ZN17URLRequestHttpJobD0Ev
 }
+{
+   bug_52826
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN14TestingProfile20CreateRequestContextEv
+   fun:_ZN20GoogleURLTrackerTest20CreateRequestContextEv
+}
 {
    bug_52831
    Memcheck:Leak