Apply new MD shadows to CrOS tray bubbles.

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/material_design/material_design_controller.h"
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 350 matching lines @@
   SystemTrayNotifier* tray_notifier = WmShell::Get()->system_tray_notifier();
   tray_notifier->RemoveIMEObserver(this);
   tray_notifier->RemoveVirtualKeyboardObserver(this);
 }
 
 void ImeMenuTray::ShowImeMenuBubble() {
   int minimum_menu_width = GetMinimumMenuWidth();
   should_block_shelf_auto_hide_ = true;
   views::TrayBubbleView::InitParams init_params(
       GetAnchorAlignment(), minimum_menu_width, minimum_menu_width);
-  init_params.can_activate = true;
   init_params.close_on_deactivate = true;
 
   views::TrayBubbleView* bubble_view =
       views::TrayBubbleView::Create(GetBubbleAnchor(), this, &init_params);
   bubble_view->set_anchor_view_insets(GetBubbleAnchorInsets());
 
   // In the material design, we will add a title item with a separator on the
   // top of the IME menu.
   if (MaterialDesignController::IsSystemTrayMenuMaterial()) {
     bubble_view->AddChildView(
@@ skipping 204 matching lines @@
   WmShell::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