Add "previewing on hover" support for password field.

components/password_manager/core/browser/password_manager_driver.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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_MANAGER_DRIVER_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_MANAGER_DRIVER_H_
 
 #include <vector>
 
 namespace autofill {
@@ skipping 27 matching lines @@
   // If this browsing session should not be persisted.
   virtual bool IsOffTheRecord() = 0;
 
   // Informs the driver that |form| can be used for password generation.
   virtual void AllowPasswordGenerationForForm(autofill::PasswordForm* form) = 0;
 
   // Notifies the driver that account creation |forms| were found.
   virtual void AccountCreationFormsFound(
       const std::vector<autofill::FormData>& forms) = 0;
 
-  // Tells the driver to accept the password autofill suggestion for |username|
-  // and fill the password with |password|.
-  virtual void AcceptPasswordAutofillSuggestion(
-      const base::string16& username,
-      const base::string16& password) = 0;
+  // Tells the driver to fill the form with the |username| and |password|.
+  virtual void FillSuggestion(const base::string16& username,
+                              const base::string16& password) = 0;
+
+  // Tells the driver to preview filling form with the |username| and
+  // |password|.
+  virtual void PreviewSuggestion(const base::string16& username,
+                                 const base::string16& password) = 0;
+
+  // Tells the driver to clear previewed password and username fields.
+  virtual void ClearPreviewedForm() = 0;
 
   // Returns the PasswordGenerationManager associated with this instance.
   virtual PasswordGenerationManager* GetPasswordGenerationManager() = 0;
 
   // Returns the PasswordManager associated with this instance.
   virtual PasswordManager* GetPasswordManager() = 0;
 
   // Returns the PasswordAutofillManager associated with this instance.
   virtual PasswordAutofillManager* GetPasswordAutofillManager() = 0;
 
   // Returns the AutofillManager associated with this instance.
   virtual autofill::AutofillManager* GetAutofillManager() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PasswordManagerDriver);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_MANAGER_DRIVER_H_