[Password Manager] Use successful XHR submission as a signal for password saving

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 46 matching lines @@
 
   // Shows an Autofill popup with username suggestions for |element|. If
   // |show_all| is |true|, will show all possible suggestions for that element,
   // otherwise shows suggestions based on current value of |element|.
   // Returns true if any suggestions were shown, false otherwise.
   bool ShowSuggestions(const blink::WebInputElement& element, bool show_all);
 
   // Called when new form controls are inserted.
   void OnDynamicFormsSeen();
 
+  // Called when an XHR has succesfully completed. Used to determine if
+  // a form has been submitted by XHR without navigation.
+  void XHRSucceeded();
+
   // 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:
@@ skipping 142 matching lines @@
   // Clears the preview for the username and password fields, restoring both to
   // their previous filled state.
   void ClearPreview(blink::WebInputElement* username,
                     blink::WebInputElement* password);
 
   // Extracts a PasswordForm from |form| and saves it as
   // |provisionally_saved_form_|, as long as it satisfies |restriction|.
   void ProvisionallySavePassword(const blink::WebFormElement& form,
                                  ProvisionallySaveRestriction restriction);
 
+  // Returns true if |provisionally_saved_form_| has enough information that
+  // it is likely filled out.
+  bool ProvisionallySavedPasswordIsValid();
+
   // Passes through |RenderViewObserver| method to |this|.
   LegacyPasswordAutofillAgent legacy_;
 
   // The logins we have filled so far with their associated info.
   LoginToPasswordInfoMap login_to_password_info_;
   // And the keys under which PasswordAutofillManager can find the same info.
   LoginToPasswordInfoKeyMap login_to_password_info_key_;
   // A (sort-of) reverse map to |login_to_password_info_|.
   PasswordToLoginMap password_to_username_;
 
@@ skipping 32 matching lines @@
   bool save_password_on_in_page_navigation_;
 
   base::WeakPtrFactory<PasswordAutofillAgent> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_