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

ui/events/ozone/evdev/event_modifiers_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/event_modifiers_evdev.h"
 
 #include <linux/input.h>
 
 #include "ui/events/event.h"
 
 namespace ui {
 
 namespace {
 
 static const int kEventFlagFromModifiers[] = {
     EF_NONE,                 // EVDEV_MODIFIER_NONE,
     EF_CAPS_LOCK_DOWN,       // EVDEV_MODIFIER_CAPS_LOCK
     EF_SHIFT_DOWN,           // EVDEV_MODIFIER_SHIFT
     EF_CONTROL_DOWN,         // EVDEV_MODIFIER_CONTROL
     EF_ALT_DOWN,             // EVDEV_MODIFIER_ALT
     EF_LEFT_MOUSE_BUTTON,    // EVDEV_MODIFIER_LEFT_MOUSE_BUTTON
     EF_MIDDLE_MOUSE_BUTTON,  // EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON
     EF_RIGHT_MOUSE_BUTTON,   // EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON
+    EF_BACK_MOUSE_BUTTON,    // EVDEV_MODIFIER_BACK_MOUSE_BUTTON
+    EF_FORWARD_MOUSE_BUTTON, // EVDEV_MODIFIER_FORWARD_MOUSE_BUTTON
     EF_COMMAND_DOWN,         // EVDEV_MODIFIER_COMMAND
     EF_ALTGR_DOWN,           // EVDEV_MODIFIER_ALTGR
     EF_MOD3_DOWN,            // EVDEV_MODIFIER_MOD3
 };
 
 }  // namespace
 
 EventModifiersEvdev::EventModifiersEvdev()
     : modifier_flags_locked_(0), modifier_flags_(0) {
   memset(modifiers_down_, 0, sizeof(modifiers_down_));
@@ skipping 46 matching lines @@
 }
 
 int EventModifiersEvdev::GetModifierFlags() { return modifier_flags_; }
 
 // static
 int EventModifiersEvdev::GetEventFlagFromModifier(unsigned int modifier) {
   return kEventFlagFromModifiers[modifier];
 }
 
 }  // namespace ui