Accept keyword by pressing space.

chrome/browser/gtk/location_bar_view_gtk.h

 // Copyright (c) 2010 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_GTK_LOCATION_BAR_VIEW_GTK_H_
 #define CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 92 matching lines @@
       WindowOpenDisposition disposition,
       PageTransition::Type transition,
       const GURL& alternate_nav_url);
   virtual void OnChanged();
   virtual void OnSelectionBoundsChanged();
   virtual void OnKillFocus();
   virtual void OnSetFocus();
   virtual void OnInputInProgress(bool in_progress);
   virtual SkBitmap GetFavIcon() const;
   virtual std::wstring GetTitle() const;
+  virtual bool IsKeywordHintVisible() const;
 
   // Implement the LocationBar interface.
   virtual void ShowFirstRunBubble(FirstRun::BubbleType bubble_type);
   virtual void SetSuggestedText(const string16& text);
   virtual std::wstring GetInputString() const;
   virtual WindowOpenDisposition GetWindowOpenDisposition() const;
   virtual PageTransition::Type GetPageTransition() const;
   virtual void AcceptInput();
   virtual void FocusLocation(bool select_all);
   virtual void FocusSearch();
@@ skipping 303 matching lines @@
   // The last search keyword that was shown via the |tab_to_search_box_|.
   std::wstring last_keyword_;
 
   // True if we should update the instant controller when the edit text changes.
   bool update_instant_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_