Add "previewing on hover" support for single-field autocomplete input

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 63 matching lines @@
   // |username|.
   virtual void RendererShouldAcceptPasswordAutofillSuggestion(
       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 preview the AutoComplete node.
+  virtual void RendererShouldPreviewAutoCompleteNode(
+      const base::string16& value) = 0;

[Ilya Sherman, 2014/02/22 05:59:51]

nit: Please move this to be below the corresponding method for filling the
field.  I'd like to consistently order methods as "fill" followed by "preview".

[ziran.sun, 2014/02/27 15:38:11]

Done.

+
   // Tells the renderer to set the node text.
   virtual void RendererShouldSetNodeText(const base::string16& value) = 0;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_DRIVER_H_