Suppress leaks in ManagedMode::ManagedMode()

TBR=bauerb@chromium.org
BUG=143431
TEST=waterfall.sh

Review URL: https://chromiumcodereview.appspot.com/10825423

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152134 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -5800,6 +5800,15 @@
    ...
    fun:_ZN10extensions*Permission*Test*
 }
+{
+   bug_143431
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN11ManagedModeC2Ev
+   fun:_ZN12_GLOBAL__N_115FakeManagedModeC1Ev
+   fun:_ZN15ManagedModeTestC2Ev
+   fun:_ZN*ManagedModeTest_*
+}
 
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