Don't show host permission warnings for platform apps.

chrome/browser/extensions/convert_web_app_browsertest.cc

 // Copyright (c) 2012 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 <string>
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/permissions/permission_set.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 
 using extensions::APIPermission;
 
 class ExtensionFromWebAppTest
@@ skipping 58 matching lines @@
       APIPermission::kNotification));
 
   ASSERT_EQ(3u, installed_extension_->icons().map().size());
   EXPECT_EQ("icons/16.png", installed_extension_->icons().Get(
       16, ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("icons/48.png", installed_extension_->icons().Get(
       48, ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("icons/128.png", installed_extension_->icons().Get(
       128, ExtensionIconSet::MATCH_EXACTLY));
 }