Destroy (Password)AutofillAgent safely

components/autofill/content/renderer/password_generation_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_GENERATION_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_GENERATION_AGENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 60 matching lines @@
         linked_ptr<PasswordForm> form,
         std::vector<blink::WebInputElement> password_elements);
     AccountCreationFormData(const AccountCreationFormData& other);
     ~AccountCreationFormData();
   };
 
   typedef std::vector<AccountCreationFormData> AccountCreationFormDataList;
 
   // RenderFrameObserver:
   void DidFinishDocumentLoad() override;
+  void OnDestruct() override;
 
   // Message handlers.
   void OnFormNotBlacklisted(const PasswordForm& form);
   void OnPasswordAccepted(const base::string16& password);
   void OnFormsEligibleForGenerationFound(
       const std::vector<autofill::PasswordFormGenerationData>& forms);
 
   // Helper function that will try and populate |password_elements_| and
   // |possible_account_creation_form_|.
   void FindPossibleGenerationForm();
@@ skipping 67 matching lines @@
   // Unowned pointer. Used to notify PassowrdAutofillAgent when values
   // in password fields are updated.
   PasswordAutofillAgent* password_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordGenerationAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_GENERATION_AGENT_H_