Support app.window.create on athena

extensions/shell/browser/default_shell_browser_main_delegate.cc

Index: extensions/shell/browser/default_shell_browser_main_delegate.cc
diff --git a/extensions/shell/browser/default_shell_browser_main_delegate.cc b/extensions/shell/browser/default_shell_browser_main_delegate.cc
index 491fe4370324a1e5d70243477782fd304cf63a61..700355bf53ef98ef945633718125b8f89c33134b 100644
--- a/extensions/shell/browser/default_shell_browser_main_delegate.cc
+++ b/extensions/shell/browser/default_shell_browser_main_delegate.cc
@@ -7,6 +7,7 @@
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#include "extensions/shell/browser/shell_apps_client.h"
 #include "extensions/shell/browser/shell_desktop_controller.h"
 #include "extensions/shell/browser/shell_extension_system.h"
 #include "extensions/shell/common/switches.h"
@@ -45,4 +46,8 @@ DesktopController* DefaultShellBrowserMainDelegate::CreateDesktopController() {
   return new ShellDesktopController();
 }
 
+AppsClient* DefaultShellBrowserMainDelegate::CreateAppsClient() {
+  return new ShellAppsClient();
+}
+
 }  // namespace extensions