Have browser process shutdown metro viewer on Metro -> Metro restart.

ui/aura/remote_root_window_host_win.cc

Index: ui/aura/remote_root_window_host_win.cc
diff --git a/ui/aura/remote_root_window_host_win.cc b/ui/aura/remote_root_window_host_win.cc
index 18296f5e178fe4659c40143a8e4852927722e42d..cc02930bd1d6651b3162864fd819d7c34050f044 100644
--- a/ui/aura/remote_root_window_host_win.cc
+++ b/ui/aura/remote_root_window_host_win.cc
@@ -142,6 +142,12 @@ void HandleActivateDesktop(const base::FilePath& shortcut,
                                                                    ash_exit);
 }
 
+void HandleMetroExit() {
+  DCHECK(aura::RemoteRootWindowHostWin::Instance());
+  aura::RemoteRootWindowHostWin::Instance()->HandleMetroExit();
+}
+
+

[sky, 2014/01/09 16:40:05]

nit: only one newline.

[zturner, 2014/01/10 19:00:26]

Done.

 RemoteRootWindowHostWin* g_instance = NULL;
 
 RemoteRootWindowHostWin* RemoteRootWindowHostWin::Instance() {
@@ -248,6 +254,13 @@ void RemoteRootWindowHostWin::HandleActivateDesktop(
   host_->Send(new MetroViewerHostMsg_ActivateDesktop(shortcut, ash_exit));
 }
 
+void RemoteRootWindowHostWin::HandleMetroExit() {
+  if (!host_)
+    return;
+  host_->Send(new MetroViewerHostMsg_MetroExit());
+}
+
+
 void RemoteRootWindowHostWin::HandleOpenFile(
     const base::string16& title,
     const base::FilePath& default_path,