[Merge] Make mouse buttons 8 - 11 navigate forward and back in history

ui/events/ozone/evdev/keyboard_evdev.cc

 // Copyright 2014 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/ozone/evdev/keyboard_evdev.h"
 
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/dom4/keycode_converter.h"
@@ skipping 21 matching lines @@
     case EF_ALT_DOWN:
       return EVDEV_MODIFIER_ALT;
     case EF_ALTGR_DOWN:
       return EVDEV_MODIFIER_ALTGR;
     case EF_LEFT_MOUSE_BUTTON:
       return EVDEV_MODIFIER_LEFT_MOUSE_BUTTON;
     case EF_MIDDLE_MOUSE_BUTTON:
       return EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON;
     case EF_RIGHT_MOUSE_BUTTON:
       return EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON;
+    case EF_BACK_MOUSE_BUTTON:
+      return EVDEV_MODIFIER_BACK_MOUSE_BUTTON;
+    case EF_FORWARD_MOUSE_BUTTON:
+      return EVDEV_MODIFIER_FORWARD_MOUSE_BUTTON;
     case EF_COMMAND_DOWN:
       return EVDEV_MODIFIER_COMMAND;
     default:
       return EVDEV_MODIFIER_NONE;
   }
 }
 
 }  // namespace
 
 KeyboardEvdev::KeyboardEvdev(EventModifiersEvdev* modifiers,
@@ skipping 140 matching lines @@
     UpdateModifier(ModifierDomKeyToEventFlag(dom_key), down);
 
   KeyEvent event(down ? ET_KEY_PRESSED : ET_KEY_RELEASED, key_code, dom_code,
                  modifiers_->GetModifierFlags(), dom_key, character, timestamp);
   if (platform_keycode)
     event.set_platform_keycode(platform_keycode);
   callback_.Run(&event);
 }
 
 }  // namespace ui