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

ash/common/system/chromeos/ime_menu/ime_menu_tray.cc

 // Copyright 2016 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/chromeos/ime_menu/ime_menu_tray.h"
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/ash_constants.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 231 matching lines @@
 
   ImeMenuTray* ime_menu_tray_;
   SystemMenuButton* emoji_button_;
   SystemMenuButton* handwriting_button_;
   SystemMenuButton* voice_button_;
   SystemMenuButton* settings_button_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeButtonsView);
 };
 
-// The list view that contains the selected IME and property items.
+// A list of available IMEs shown in the opt-in IME menu, which has a different
+// height depending on the number of IMEs in the list.
 class ImeMenuListView : public ImeListView {
  public:
   ImeMenuListView(SystemTrayItem* owner) : ImeListView(owner) {
     set_should_focus_ime_after_selection_with_keyboard(true);
   }
 
   ~ImeMenuListView() override {}
 
  protected:
   void Layout() override {
@@ skipping 279 matching lines @@
   Shell::Get()->system_tray_delegate()->GetCurrentIME(&current_ime_);
 
   // Updates the tray label based on the current input method.
   if (current_ime_.third_party)
     label_->SetText(current_ime_.short_name + base::UTF8ToUTF16("*"));
   else
     label_->SetText(current_ime_.short_name);
 }
 
 }  // namespace ash