[Extensions] Create ChromeTestExtensionLoader

chrome/browser/extensions/chrome_extension_test_notification_observer.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/extensions/chrome_extension_test_notification_observer.h>
 #include "base/scoped_observer.h"
 #include "chrome/browser/extensions/extension_action_test_util.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 34 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // ExtensionTestNotificationObserver
 
 ChromeExtensionTestNotificationObserver::
     ChromeExtensionTestNotificationObserver(Browser* browser)
     : ExtensionTestNotificationObserver(browser ? browser->profile() : nullptr),
       browser_(browser) {}
 
 ChromeExtensionTestNotificationObserver::
+    ChromeExtensionTestNotificationObserver(content::BrowserContext* context)
+    : ExtensionTestNotificationObserver(context), browser_(nullptr) {}
+
+ChromeExtensionTestNotificationObserver::
     ~ChromeExtensionTestNotificationObserver() {}
 
 content::BrowserContext*
 ChromeExtensionTestNotificationObserver::GetBrowserContext() {
   if (!context_) {
     if (browser_)
       context_ = browser_->profile();
     else
       context_ = ProfileManager::GetActiveUserProfile();
   }
   return context_;
 }
 
 bool ChromeExtensionTestNotificationObserver::
     WaitForPageActionVisibilityChangeTo(int count) {
+  DCHECK(browser_);
   ScopedObserver<extensions::ExtensionActionAPI,
                  extensions::ExtensionActionAPI::Observer>
       observer(this);
   observer.Add(extensions::ExtensionActionAPI::Get(GetBrowserContext()));
   WaitForCondition(
       base::Bind(&HasPageActionVisibilityReachedTarget, browser_, count), NULL);
   return true;
 }
 
 bool ChromeExtensionTestNotificationObserver::WaitForExtensionViewsToLoad() {
@@ skipping 36 matching lines @@
 
 void ChromeExtensionTestNotificationObserver::WaitForExtensionAndViewLoad() {
   WaitForExtensionLoad();
   WaitForExtensionViewsToLoad();
 }
 
 void ChromeExtensionTestNotificationObserver::OnPageActionsUpdated(
     content::WebContents* web_contents) {
   MaybeQuit();
 }