[Ash] Remove non-MD code from ImeListView and ImeListItemView

ash/common/system/ime/tray_ime_chromeos.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/common/system/ime/tray_ime_chromeos.h"
 
 #include <vector>
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 52 matching lines @@
 
     std::unique_ptr<TrayPopupItemStyle> style = CreateStyle();
     SetImage(
         gfx::CreateVectorIcon(kSystemMenuKeyboardIcon, style->GetIconColor()));
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(IMEDefaultView);
 };
 
+// A list of available IMEs shown in the IME detailed view of the system menu,
+// along with other items in the title row (a settings button and optional
+// enterprise-controlled icon).
 class IMEDetailedView : public ImeListView {
  public:
   IMEDetailedView(SystemTrayItem* owner, LoginStatus login)
       : ImeListView(owner), login_(login), settings_button_(nullptr) {}
 
   ~IMEDetailedView() override {}
 
   void SetImeManagedMessage(base::string16 ime_managed_message) {
     ime_managed_message_ = ime_managed_message;
   }
@@ skipping 216 matching lines @@
   return ime_count >= threshold;
 }
 
 ImeListView::SingleImeBehavior TrayIME::GetSingleImeBehavior() {
   // If managed, we also want to show a single IME.
   return IsIMEManaged() ? ImeListView::SHOW_SINGLE_IME
                         : ImeListView::HIDE_SINGLE_IME;
 }
 
 }  // namespace ash