Add "previewing on hover" support for password field.

components/autofill/core/browser/autofill_driver.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_CORE_BROWSER_AUTOFILL_DRIVER_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_DRIVER_H_
 
 #include <vector>
 
 #include "components/autofill/core/common/form_data.h"
@@ skipping 55 matching lines @@
 
   // Tells the renderer to accept data list suggestions for |value|.
   virtual void RendererShouldAcceptDataListSuggestion(
       const base::string16& value) = 0;
 
   // Tells the renderer to accept the password autofill suggestion for
   // |username|.
   virtual void RendererShouldAcceptPasswordAutofillSuggestion(
       const base::string16& username) = 0;
 
+  // Tells the renderer to preview the password autofill suggestion for
+  // |username|.
+  virtual void RendererShouldPreviewPassword(
+      const base::string16& username) = 0;
+
   // Tells the renderer to clear the currently filled Autofill results.
   virtual void RendererShouldClearFilledForm() = 0;
 
   // Tells the renderer to clear the currently previewed Autofill results.
   virtual void RendererShouldClearPreviewedForm() = 0;
 
   // Tells the renderer to set the node text.
   virtual void RendererShouldFillFieldWithValue(
       const base::string16& value) = 0;
 
   // Tells the renderer to preview the node with suggested text.
   virtual void RendererShouldPreviewFieldWithValue(
       const base::string16& value) = 0;
 
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_DRIVER_H_