Instant extended API: Make arrow up/down work.

chrome/browser/instant/instant_controller.h

Index: chrome/browser/instant/instant_controller.h
diff --git a/chrome/browser/instant/instant_controller.h b/chrome/browser/instant/instant_controller.h
index d2510e49414c8cbba18a91452fad8fba4bea810c..1d6930f6fea51a1a91c0917ebed6cd4106b0f145 100644
--- a/chrome/browser/instant/instant_controller.h
+++ b/chrome/browser/instant/instant_controller.h
@@ -110,6 +110,11 @@ class InstantController : public InstantLoaderDelegate {
   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.