Add PermissionPromptAndroid skeleton

chrome/browser/permissions/grouped_permission_infobar_delegate_android.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/permissions/grouped_permission_infobar_delegate_android.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/android_theme_resources.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/permissions/permission_request.h"
@@ skipping 86 matching lines @@
 base::string16 GroupedPermissionInfoBarDelegate::GetButtonLabel(
     InfoBarButton button) const {
   if (permission_count() > 1) {
     return l10n_util::GetStringUTF16((button == BUTTON_OK) ? IDS_APP_OK
                                                            : IDS_APP_CANCEL);
   }
 
   return l10n_util::GetStringUTF16((button == BUTTON_OK) ? IDS_PERMISSION_ALLOW
                                                          : IDS_PERMISSION_DENY);
 }
+
+GroupedPermissionInfoBarDelegate*
+GroupedPermissionInfoBarDelegate::AsGroupedPermissionInfoBarDelegate() {
+  return this;
+}