Instantiate AppShimMenuController when app launcher is enabled. (Mac)

chrome/browser/app_controller_mac.mm

Index: chrome/browser/app_controller_mac.mm
diff --git a/chrome/browser/app_controller_mac.mm b/chrome/browser/app_controller_mac.mm
index a90577ad52f2e4a2e17096f8e92b5970b1053825..2242075c3d07dee832c9d61fbaa21e1287e764de 100644
--- a/chrome/browser/app_controller_mac.mm
+++ b/chrome/browser/app_controller_mac.mm
@@ -681,8 +681,7 @@ class AppControllerProfileObserver : public ProfileInfoCacheObserver {
 
   // Start managing the menu for app windows. This needs to be done here because
   // main menu item titles are not yet initialized in awakeFromNib.
-  if (apps::IsAppShimsEnabled())
-    appShimMenuController_.reset([[AppShimMenuController alloc] init]);
+  [self initAppShimMenuController];
 
   // Build up the encoding menu, the order of the items differs based on the
   // current locale (see http://crbug.com/7647 for details).
@@ -1461,6 +1460,11 @@ class AppControllerProfileObserver : public ProfileInfoCacheObserver {
   workAreaChangeObservers_.RemoveObserver(observer);
 }
 
+- (void)initAppShimMenuController {
+  if (apps::IsAppShimsEnabled() && !appShimMenuController_)
+    appShimMenuController_.reset([[AppShimMenuController alloc] init]);
+}
+
 - (void)applicationDidChangeScreenParameters:(NSNotification*)notification {
   // During this callback the working area is not always already updated. Defer.
   [self performSelector:@selector(delayedScreenParametersUpdate)