Move application lifetime functionality off BrowserList.

chrome/browser/lifetime/application_lifetime_mac.mm

Index: chrome/browser/lifetime/application_lifetime_mac.mm
===================================================================
--- chrome/browser/lifetime/application_lifetime_mac.mm	(revision 0)
+++ chrome/browser/lifetime/application_lifetime_mac.mm	(working copy)
@@ -2,13 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/lifetime/application_lifetime.h"
 
 #include "chrome/browser/browser_shutdown.h"
 #import "chrome/browser/chrome_browser_application_mac.h"
 
-// static
-void BrowserList::HandleAppExitingForPlatform() {
+namespace browser {
+
+void HandleAppExitingForPlatform() {
   // Last browser is closed, so call back to controller to shutdown the app.
   chrome_browser_application_mac::Terminate();
 }
+
+}  // namespace browser