[Password Manager] Unfriend PasswordAutofillAgentTest from PasswordAutofillAgent (clean-up).

components/autofill/content/renderer/password_autofill_agent.h

 // Copyright 2013 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 COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 55 matching lines @@
   // Called when the user first interacts with the page after a load. This is a
   // signal to make autofilled values of password input elements accessible to
   // JavaScript.
   void FirstUserGestureObserved();
 
  protected:
   virtual bool OriginCanAccessPasswordManager(
       const blink::WebSecurityOrigin& origin);
 
  private:
-  friend class PasswordAutofillAgentTest;
-
   enum OtherPossibleUsernamesUsage {
     NOTHING_TO_AUTOFILL,
     OTHER_POSSIBLE_USERNAMES_ABSENT,
     OTHER_POSSIBLE_USERNAMES_PRESENT,
     OTHER_POSSIBLE_USERNAME_SHOWN,
     OTHER_POSSIBLE_USERNAME_SELECTED,
     OTHER_POSSIBLE_USERNAMES_MAX
   };
 
   // Ways to restrict which passwords are saved in ProvisionallySavePassword.
@@ skipping 157 matching lines @@
   bool did_stop_loading_;
 
   base::WeakPtrFactory<PasswordAutofillAgent> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_