Another valgrind suppression.

BUG=70782
TBR=ahendrickson

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72516 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -3639,3 +3639,9 @@
    fun:_ZN15SyncSetupWizardC2EP18ProfileSyncService
    fun:_ZN15SyncSetupWizardC1EP18ProfileSyncService
 }
+{
+   bug_70782_c
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN25SharedResourcesDataSource8RegisterEv
+}