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

components/autofill/core/browser/autofill_external_delegate.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_EXTERNAL_DELEGATE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_EXTERNAL_DELEGATE_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 26 matching lines @@
   // Creates an AutofillExternalDelegate for the specified AutofillManager and
   // AutofillDriver.
   AutofillExternalDelegate(AutofillManager* manager,
                            AutofillDriver* driver);
   virtual ~AutofillExternalDelegate();
 
   // AutofillPopupDelegate implementation.
   virtual void OnPopupShown() OVERRIDE;
   virtual void OnPopupHidden() OVERRIDE;
   virtual bool ShouldRepostEvent(const ui::MouseEvent& event) OVERRIDE;
-  virtual void DidSelectSuggestion(int identifier) OVERRIDE;
+  virtual void DidSelectSuggestion(const base::string16& value,
+                                   int identifier) OVERRIDE;
   virtual void DidAcceptSuggestion(const base::string16& value,
                                    int identifier) OVERRIDE;
   virtual void RemoveSuggestion(const base::string16& value,
                                 int identifier) OVERRIDE;
   virtual void ClearPreviewedForm() OVERRIDE;
 
   // Records and associates a query_id with web form data.  Called
   // when the renderer posts an Autofill query to the browser. |bounds|
   // is window relative. |display_warning_if_disabled| tells us if we should
   // display warnings (such as autofill is disabled, but had suggestions).
@@ skipping 104 matching lines @@
   std::vector<base::string16> data_list_labels_;
 
   base::WeakPtrFactory<AutofillExternalDelegate> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillExternalDelegate);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_EXTERNAL_DELEGATE_H_