Delete the GTK+ port of Chrome.

ui/events/keycodes/keyboard_code_conversion_x.cc

 // 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.
 
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
 
 #define XK_3270  // for XK_3270_BackTab
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
@@ skipping 353 matching lines @@
       return VKEY_F14;
     case XF86XK_Launch6:
       return VKEY_F15;
     case XF86XK_Launch7:
       return VKEY_F16;
     case XF86XK_Launch8:
       return VKEY_F17;
     case XF86XK_Launch9:
       return VKEY_F18;
 
-#if defined(TOOLKIT_GTK)
-    case XF86XK_Refresh:
-    case XF86XK_History:
-    case XF86XK_OpenURL:
-    case XF86XK_AddFavorite:
-    case XF86XK_Go:
-    case XF86XK_ZoomIn:
-    case XF86XK_ZoomOut:
-      // ui::AcceleratorGtk tries to convert the XF86XK_ keysyms on Chrome
-      // startup. It's safe to return VKEY_UNKNOWN here since ui::AcceleratorGtk
-      // also checks a Gdk keysym. http://crbug.com/109843
-      return VKEY_UNKNOWN;
-#endif
-
     // For supporting multimedia buttons on a USB keyboard.
     case XF86XK_Back:
       return VKEY_BROWSER_BACK;
     case XF86XK_Forward:
       return VKEY_BROWSER_FORWARD;
     case XF86XK_Reload:
       return VKEY_BROWSER_REFRESH;
     case XF86XK_Stop:
       return VKEY_BROWSER_STOP;
     case XF86XK_Search:
@@ skipping 420 matching lines @@
     case VKEY_KBD_BRIGHTNESS_UP:
       return XF86XK_KbdBrightnessUp;
 
     default:
       LOG(WARNING) << "Unknown keycode:" << keycode;
       return 0;
     }
 }
 
 }  // namespace ui