Support XK_ugrave/XK_Ugrave key.

ui/base/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/base/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 321 matching lines @@
       return static_cast<KeyboardCode>(VKEY_F1 + (keysym - XK_F1));
     case XK_KP_F1:
     case XK_KP_F2:
     case XK_KP_F3:
     case XK_KP_F4:
       return static_cast<KeyboardCode>(VKEY_F1 + (keysym - XK_KP_F1));
 
     case XK_guillemotleft:
     case XK_guillemotright:
     case XK_degree:
+    // In the case of canadian multilingual keyboard layout, VKEY_OEM_102 is
+    // assigned to ugrave key.
+    case XK_ugrave:
+    case XK_Ugrave:
       return VKEY_OEM_102;  // international backslash key in 102 keyboard.
 
     // When evdev is in use, /usr/share/X11/xkb/symbols/inet maps F13-18 keys
     // to the special XF86XK symbols to support Microsoft Ergonomic keyboards:
     // https://bugs.freedesktop.org/show_bug.cgi?id=5783
     // In Chrome, we map these X key symbols back to F13-18 since we don't have
     // VKEYs for these XF86XK symbols.
     case XF86XK_Tools:
       return VKEY_F13;
     case XF86XK_Launch5:
@@ skipping 430 matching lines @@
     case VKEY_KBD_BRIGHTNESS_UP:
       return XF86XK_KbdBrightnessUp;
 
     default:
       LOG(WARNING) << "Unknown keycode:" << keycode;
       return 0;
     }
 }
 
 }  // namespace ui