Added suppression for leak of AsyncPolicyLoader.

AsyncPolicyLoader is freed via DeleteSoon() via the FILE thread, but in some tests it happens too late (after the BrowserProcessImpl destructor has been called).

TBR=oshima@chromium.org
BUG=141255

Review URL: https://chromiumcodereview.appspot.com/10830205

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150449 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -5844,6 +5844,14 @@
    fun:_ZN12ReloadButtonC1EP15LocationBarViewP14CommandUpdater
    fun:_ZN16ReloadButtonTestC2Ev
 }
+{
+   bug_141255
+   Memcheck:Leak
+   ...
+   fun:_ZN6policy22BrowserPolicyConnector22CreatePlatformProviderEv
+   fun:_ZN6policy22BrowserPolicyConnector4InitEv
+   fun:_ZN21TestingBrowserProcess24browser_policy_connectorEv
+}
 
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