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

ui/events/ozone/evdev/event_factory_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_factory_evdev.h"
 
 #include "base/bind.h"
 #include "base/task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
@@ skipping 160 matching lines @@
   switch (button) {
     case BTN_LEFT:
       modifier = EVDEV_MODIFIER_LEFT_MOUSE_BUTTON;
       break;
     case BTN_RIGHT:
       modifier = EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON;
       break;
     case BTN_MIDDLE:
       modifier = EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON;
       break;
+    case BTN_BACK:
+      modifier = EVDEV_MODIFIER_BACK_MOUSE_BUTTON;
+      break;
+    case BTN_FORWARD:
+      modifier = EVDEV_MODIFIER_FORWARD_MOUSE_BUTTON;
+      break;
     default:
       return;
   }
 
   int flag = modifiers_.GetEventFlagFromModifier(modifier);
   modifiers_.UpdateModifier(modifier, params.down);
 
   MouseEvent event(params.down ? ui::ET_MOUSE_PRESSED : ui::ET_MOUSE_RELEASED,
                    params.location, params.location, params.timestamp,
                    modifiers_.GetModifierFlags() | flag,
@@ skipping 136 matching lines @@
 
   // Hook up device configuration.
   input_controller_.SetInputDeviceFactory(input_device_factory_proxy_.get());
 
   // Scan & monitor devices.
   device_manager_->AddObserver(this);
   device_manager_->ScanDevices(this);
 }
 
 }  // namespace ui