Remove obsolete code that handles menu key release for chromeos

ui/views/widget/native_widget_aura.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/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/activation_change_observer.h"
@@ skipping 617 matching lines @@
 
 void NativeWidgetAura::SetVisibilityChangedAnimationsEnabled(bool value) {
   window_->SetProperty(aura::client::kAnimationsDisabledKey, !value);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, views::InputMethodDelegate implementation:
 
 void NativeWidgetAura::DispatchKeyEventPostIME(const ui::KeyEvent& key) {
   FocusManager* focus_manager = GetWidget()->GetFocusManager();
-  if (focus_manager)
-    focus_manager->MaybeResetMenuKeyState(key);
   if (delegate_->OnKeyEvent(key) || !focus_manager)
     return;
   focus_manager->OnKeyEvent(key);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, aura::WindowDelegate implementation:
 
 gfx::Size NativeWidgetAura::GetMinimumSize() const {
   return delegate_->GetMinimumSize();
@@ skipping 357 matching lines @@
   return aura::Env::GetInstance()->is_mouse_button_down();
 }
 
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   return aura::Env::GetInstance()->is_touch_down();
 }
 
 }  // namespace internal
 }  // namespace views