Suppress UNADDRESSABLE ACCESS in mojo::internal::WeakServiceProvider::Clear

BUG=403013
TBR=ben@chromium.org

Review URL: https://codereview.chromium.org/465013002

Cr-Commit-Position: refs/heads/master@{#289058}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289058 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/drmemory/suppressions.txt

@@ -645,3 +645,11 @@ content.dll!content::WebThreadBase::TaskObserverAdapter::WillProcessTask
 base.dll!base::MessageLoop::RunTask
 base.dll!base::Thread::StopSoon
 base.dll!base::MessageLoop::DeferOrRunPendingTask
+
+
+UNADDRESSABLE ACCESS
+name=http://crbug.com/403013
+mojo_view_manager_lib_unittests.!mojo::internal::WeakServiceProvider::Clear
+mojo_view_manager_lib_unittests.!mojo::ServiceProviderImpl::OnConnectionError
+...
+mojo_view_manager_lib_unittests.!mojo::shell::ShellTestHelper::~ShellTestHelper