Make mash register initial batch of accelerators in single shot.

ui/views/focus/focus_manager.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/views/focus/focus_manager.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 479 matching lines @@
         &new_focus_traversable,
         &new_starting_view);
   }
   return v;
 }
 
 void FocusManager::RegisterAccelerator(
     const ui::Accelerator& accelerator,
     ui::AcceleratorManager::HandlerPriority priority,
     ui::AcceleratorTarget* target) {
-  accelerator_manager_->Register(accelerator, priority, target);
+  const std::vector<ui::Accelerator>& accelerators = {accelerator};

[mfomitchev, 2016/12/22 01:04:50]

no need for a local variable.

[thanhph, 2016/12/22 20:36:02]

Done.

+  accelerator_manager_->Register(accelerators, priority, target);
 }
 
 void FocusManager::UnregisterAccelerator(const ui::Accelerator& accelerator,
                                          ui::AcceleratorTarget* target) {
   accelerator_manager_->Unregister(accelerator, target);
 }
 
 void FocusManager::UnregisterAccelerators(ui::AcceleratorTarget* target) {
   accelerator_manager_->UnregisterAll(target);
 }
@@ skipping 57 matching lines @@
 // |keyboard_accessible_| is only used on Mac.
 #if defined(OS_MACOSX)
   return keyboard_accessible_ ? view->IsAccessibilityFocusable()
                               : view->IsFocusable();
 #else
   return view->IsAccessibilityFocusable();
 #endif
 }
 
 }  // namespace views