Add "previewing on hover" support for password field.

components/password_manager/core/browser/password_autofill_manager.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_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_AUTOFILL_MANAGER_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_AUTOFILL_MANAGER_H_
 
 #include <map>
 
 #include "base/gtest_prod_util.h"
@@ skipping 37 matching lines @@
   // |suggestions| from the password manager.
   void OnShowPasswordSuggestions(
       const autofill::FormFieldData& field,
       const gfx::RectF& bounds,
       const std::vector<base::string16>& suggestions,
       const std::vector<base::string16>& realms);
 
   // Invoked to clear any page specific cached values.
   void Reset();
 
-  // A public version of AcceptSuggestion(), only for use in tests.
-  bool AcceptSuggestionForTest(const autofill::FormFieldData& field,
-                               const base::string16& username);
+  // A public version of FillSuggestion(), only for use in tests.
+  bool FillSuggestionForTest(const autofill::FormFieldData& field,
+                             const base::string16& username);
+
+  // A public version of PreviewSuggestion(), only for use in tests.
+  bool PreviewSuggestionForTest(const autofill::FormFieldData& field,
+                                const base::string16& username);
 
  private:
   typedef std::map<autofill::FormFieldData, autofill::PasswordFormFillData>
       LoginToPasswordInfoMap;
 
   // Attempts to fill the password associated with user name |username|, and
   // returns true if it was successful.
-  bool AcceptSuggestion(const autofill::FormFieldData& field,
-                        const base::string16& username);
+  bool FillSuggestion(const autofill::FormFieldData& field,
+                      const base::string16& username);
+
+  // Attempts to preview the password associated with user name |username|, and
+  // returns true if it was successful.
+  bool PreviewSuggestion(const autofill::FormFieldData& field,
+                         const base::string16& username);
 
   // If |current_username| matches a username for one of the login mappings in
   // |fill_data|, returns true and assigns the password to |out_password|.
   // Otherwise, returns false and leaves |out_password| untouched.
   bool GetPasswordForUsername(
       const base::string16& current_username,
       const autofill::PasswordFormFillData& fill_data,
       base::string16* out_password);
 
   // Finds login information for a |node| that was previously filled.
@@ skipping 12 matching lines @@
   autofill::FormFieldData form_field_;
 
   base::WeakPtrFactory<PasswordAutofillManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillManager);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_AUTOFILL_MANAGER_H_