end-to-end extension API tests

chrome/browser/extensions/extension_browsertest.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 14 matching lines @@
   // |expected_change| indicates how many extensions should be installed (or
   // disabled, if negative).
   // 1 means you expect a new install, 0 means you expect an upgrade, -1 means
   // you expect a failed upgrade.
   bool InstallExtension(const FilePath& path, int expected_change);
   void UninstallExtension(const std::string& extension_id);
 
   // Wait for the number of visible page actions to change to |count|.
   bool WaitForPageActionVisibilityChangeTo(int count);
 
+  // NotificationObserver
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
   bool loaded_;
   bool installed_;
   FilePath test_data_dir_;
 
  private:
-  virtual void Observe(NotificationType type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details);
   bool WaitForExtensionHostsToLoad();
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_