Suppress leak in AsyncPolicyLoader

tools/heapcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 1491 matching lines @@
 }
 {
    bug_141037
    Heapcheck:Leak
    ...
    fun:ReloadButton::CreateMenuModel
    fun:ReloadButton::ReloadButton
    fun:ReloadButtonTest::ReloadButtonTest
 }
 {
-   bug_141255
+   bug_141255_a
    Heapcheck:Leak
    ...
    fun:policy::BrowserPolicyConnector::CreatePlatformProvider
    fun:policy::BrowserPolicyConnector::Init
    fun:TestingBrowserProcess::browser_policy_connector
 }
+{
+   bug_141255_b
+   Heapcheck:Leak
+   fun:base::internal::WeakReferenceOwner::GetRef
+   fun:base::WeakPtrFactory::GetWeakPtr
+   fun:policy::AsyncPolicyLoader::ScheduleNextReload
+   fun:policy::AsyncPolicyLoader::Init
+}
+