attachment broker wip

chrome/app_shim/chrome_main_app_mode_mac.mm

Index: chrome/app_shim/chrome_main_app_mode_mac.mm
diff --git a/chrome/app_shim/chrome_main_app_mode_mac.mm b/chrome/app_shim/chrome_main_app_mode_mac.mm
index 98630a62270e229400f68b10a4c4a1c46f3a0b10..8cdc84549351327fb1790d606f1b7c6c82e3f9dc 100644
--- a/chrome/app_shim/chrome_main_app_mode_mac.mm
+++ b/chrome/app_shim/chrome_main_app_mode_mac.mm
@@ -33,6 +33,7 @@
 #include "chrome/common/mac/app_mode_common.h"
 #include "chrome/common/mac/app_shim_messages.h"
 #include "chrome/grit/generated_resources.h"
+#include "content/public/common/child_process_host.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_message.h"
@@ -211,8 +212,10 @@ void AppShimController::Init() {
 void AppShimController::CreateChannelAndSendLaunchApp(
     const base::FilePath& socket_path) {
   IPC::ChannelHandle handle(socket_path.value());
-  channel_ = IPC::ChannelProxy::Create(handle, IPC::Channel::MODE_NAMED_CLIENT,
-                                       this, g_io_thread->task_runner().get());
+  channel_ = IPC::ChannelProxy::Create(
+      handle, IPC::Channel::MODE_NAMED_CLIENT, this,
+      g_io_thread->task_runner().get(),
+      content::ChildProcessHost::GetAttachmentBroker());
 
   bool launched_by_chrome = base::CommandLine::ForCurrentProcess()->HasSwitch(
       app_mode::kLaunchedByChromeProcessId);