Make search icon in omnibox results hidpi

chrome/browser/ui/omnibox/omnibox_popup_model.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MODEL_H_
 #define CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MODEL_H_
 
 #include "base/basictypes.h"
 #include "chrome/browser/autocomplete/autocomplete_controller.h"
 #include "chrome/browser/autocomplete/autocomplete_result.h"
 #include "chrome/browser/ui/omnibox/omnibox_edit_model.h"
 
 class OmniboxPopupView;
-class SkBitmap;
+
+namespace gfx {
+class Image;
+}
 
 class OmniboxPopupModel {
  public:
   // See selected_line_state_ for details.
   enum LineState {
     NORMAL = 0,
     KEYWORD
   };
 
   OmniboxPopupModel(OmniboxPopupView* popup_view, OmniboxEditModel* edit_model);
@@ skipping 49 matching lines @@
   // If the selected line has both a normal match and a keyword match, this can
   // be used to choose which to select. It is an error to call this when the
   // selected line does not have both matches (or there is no selection).
   void SetSelectedLineState(LineState state);
 
   // Called when the user hits shift-delete.  This should determine if the item
   // can be removed from history, and if so, remove it and update the popup.
   void TryDeletingCurrentItem();
 
   // If |match| is from an extension, returns the extension icon; otherwise
-  // returns NULL.
-  const SkBitmap* GetIconIfExtensionMatch(const AutocompleteMatch& match) const;
+  // returns an empty Image.
+  gfx::Image GetIconIfExtensionMatch(const AutocompleteMatch& match) const;
 
   // The match the user has manually chosen, if any.
   const AutocompleteResult::Selection& manually_selected_match() const {
     return manually_selected_match_;
   }
 
   // Invoked from the edit model any time the result set of the controller
   // changes.
   void OnResultChanged();
 
@@ skipping 19 matching lines @@
   // (if KEYWORD) is selected.
   LineState selected_line_state_;
 
   // The match the user has manually chosen, if any.
   AutocompleteResult::Selection manually_selected_match_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxPopupModel);
 };
 
 #endif  // CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MODEL_H_