ipc: Use a global for the process's attachment broker.

ipc/attachment_broker_privileged_win_unittest.cc

Index: ipc/attachment_broker_privileged_win_unittest.cc
diff --git a/ipc/attachment_broker_privileged_win_unittest.cc b/ipc/attachment_broker_privileged_win_unittest.cc
index 2e46f2b42865591a92e07580c064ee2e6c1350c7..480a2b4bfa7109a59c5b12d9eb6a68e71091f65b 100644
--- a/ipc/attachment_broker_privileged_win_unittest.cc
+++ b/ipc/attachment_broker_privileged_win_unittest.cc
@@ -154,6 +154,7 @@ class IPCAttachmentBrokerPrivilegedWinTest : public IPCTestBase {
   // Takes ownership of |broker|. Has no effect if called after CommonSetUp().
   void set_broker(IPC::AttachmentBrokerUnprivilegedWin* broker) {
     broker_.reset(broker);
+    IPC::AttachmentBroker::SetGlobal(broker);
   }
 
   void CommonSetUp() {
@@ -343,7 +344,7 @@ int CommonPrivilegedProcessMain(OnMessageReceivedCallback callback,
 
   // Set up IPC channel.
   IPC::AttachmentBrokerPrivilegedWin broker;
-  listener.set_listener(&broker);
+  IPC::AttachmentBroker::SetGlobal(&broker);
   scoped_ptr<IPC::Channel> channel(IPC::Channel::CreateClient(
       IPCTestBase::GetChannelName(channel_name), &listener, &broker));
   broker.RegisterCommunicationChannel(channel.get());