Extract ResultCatcher from ExtensionApiTest. Use it in ShellApiTest.

extensions/shell/test/shell_test.h

 // Copyright 2014 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 EXTENSIONS_SHELL_TEST_SHELL_TEST_H_
 #define EXTENSIONS_SHELL_TEST_SHELL_TEST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/test/browser_test.h"
 #include "content/public/test/browser_test_base.h"
@@ skipping 14 matching lines @@
 class AppShellTest : public content::BrowserTestBase {
  public:
   AppShellTest();
   virtual ~AppShellTest();
 
   // content::BrowserTestBase implementation.
   virtual void SetUp() OVERRIDE;
   virtual void SetUpOnMainThread() OVERRIDE;
   virtual void RunTestOnMainThreadLoop() OVERRIDE;
 
-  // Loads an unpacked application from a directory using |extension_system_|
-  // and attempts to launch it. Returns true on success.
-  bool LoadAndLaunchApp(const base::FilePath& app_dir);
-
   content::BrowserContext* browser_context() { return browser_context_; }
 
- private:
+ protected:
   content::BrowserContext* browser_context_;
   ShellExtensionSystem* extension_system_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_SHELL_TEST_SHELL_TEST_H_