Close all windows when app shim quits.

chrome/browser/ui/app_list/app_list_service_mac.mm

Index: chrome/browser/ui/app_list/app_list_service_mac.mm
diff --git a/chrome/browser/ui/app_list/app_list_service_mac.mm b/chrome/browser/ui/app_list/app_list_service_mac.mm
index 3a45759192ba84773b076c36e05fb26061f19826..abf30c545c529319122147c468bfa53aff6f6cb4 100644
--- a/chrome/browser/ui/app_list/app_list_service_mac.mm
+++ b/chrome/browser/ui/app_list/app_list_service_mac.mm
@@ -64,6 +64,7 @@ class AppListServiceMac : public AppListServiceImpl,
   virtual bool OnShimLaunch(apps::AppShimHandler::Host* host) OVERRIDE;
   virtual void OnShimClose(apps::AppShimHandler::Host* host) OVERRIDE;
   virtual void OnShimFocus(apps::AppShimHandler::Host* host) OVERRIDE;
+  virtual void OnShimQuit(apps::AppShimHandler::Host* host) OVERRIDE;
 
  private:
   friend struct DefaultSingletonTraits<AppListServiceMac>;
@@ -286,6 +287,10 @@ void AppListServiceMac::OnShimFocus(apps::AppShimHandler::Host* host) {
   DismissAppList();
 }
 
+void AppListServiceMac::OnShimQuit(apps::AppShimHandler::Host* host) {
+  DismissAppList();
+}
+
 enum DockLocation {
   DockLocationOtherDisplay,
   DockLocationBottom,