Instant extended API: Make arrow up/down work.

chrome/browser/instant/instant_controller.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_INSTANT_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 92 matching lines @@
               const string16& full_text,
               bool verbatim);
 
   // Sets the bounds of the omnibox dropdown, in screen coordinates.
   void SetOmniboxBounds(const gfx::Rect& bounds);
 
   // Send autocomplete results from |providers| to the preview page.
   void HandleAutocompleteResults(
       const std::vector<AutocompleteProvider*>& providers);
 
+  // Called when the user presses up or down. |count| is a repeat count,
+  // negative for moving up, positive for moving down. Returns true if Instant
+  // handled the key press.
+  bool OnUpOrDownKeyPressed(int count);
+
   // The preview TabContents. May be NULL if ReleasePreviewContents() has been
   // called, with no subsequent successful call to Update(). InstantController
   // retains ownership of the object.
   TabContents* GetPreviewContents() const;
 
   // Hides the preview, but doesn't destroy it, in hopes it can be subsequently
   // reused. The preview will not be used until a call to Update() succeeds.
   void Hide();
 
   // Returns true if the Instant preview can be committed now. This can be true
@@ skipping 149 matching lines @@
   // Search terms extraction (for autocomplete history matches) doesn't work
   // on Instant URLs. So, whenever the user commits an Instant search, we add
   // an equivalent non-Instant search URL to history, so that the search shows
   // up in autocomplete history matches.
   GURL url_for_history_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_