Use single "modifiers" field rather than boolean fields.

ash/accelerators/accelerator_controller.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 "ash/accelerators/accelerator_controller.h"
 
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/ash_switches.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 177 matching lines @@
 AcceleratorController::~AcceleratorController() {
 }
 
 void AcceleratorController::Init() {
   for (size_t i = 0; i < kActionsAllowedAtLoginScreenLength; ++i) {
     actions_allowed_at_login_screen_.insert(kActionsAllowedAtLoginScreen[i]);
   }
 
   for (size_t i = 0; i < kAcceleratorDataLength; ++i) {
     ui::Accelerator accelerator(kAcceleratorData[i].keycode,
-                                kAcceleratorData[i].shift,
-                                kAcceleratorData[i].ctrl,
-                                kAcceleratorData[i].alt);
+                                kAcceleratorData[i].modifiers);
     accelerator.set_type(kAcceleratorData[i].trigger_on_press ?
                          ui::ET_KEY_PRESSED : ui::ET_KEY_RELEASED);
     Register(accelerator, this);
     accelerators_.insert(
         std::make_pair(accelerator, kAcceleratorData[i].action));
   }
 }
 
 void AcceleratorController::Register(const ui::Accelerator& accelerator,
                                      ui::AcceleratorTarget* target) {
@@ skipping 289 matching lines @@
     // Then set this one as active.
     Shell::GetInstance()->launcher()->ActivateLauncherItem(found_index);
   }
 }
 
 bool AcceleratorController::CanHandleAccelerators() const {
   return true;
 }
 
 }  // namespace ash