Add action for each button on opt-in IME menu.

ash/common/wm/workspace/workspace_layout_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 "ash/common/wm/workspace/workspace_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 157 matching lines @@
     }
   } else if (window_state->HasRestoreBounds()) {
     // Keyboard hidden, restore original bounds if they exist. If the user has
     // resized or dragged the window in the meantime, WorkspaceWindowResizer
     // will have cleared the restore bounds and this code will not accidentally
     // override user intent.
     window_state->SetAndClearRestoreBounds();
   }
 }
 
+void WorkspaceLayoutManager::OnKeyboardHidden() {}
+
 //////////////////////////////////////////////////////////////////////////////
 // WorkspaceLayoutManager, aura::WindowObserver implementation:
 
 void WorkspaceLayoutManager::OnWindowTreeChanged(
     WmWindow* window,
     const WmWindowObserver::TreeChangeParams& params) {
   if (!params.target->GetWindowState()->IsActive())
     return;
   // If the window is already tracked by the workspace this update would be
   // redundant as the fullscreen and shelf state would have been handled in
@@ skipping 187 matching lines @@
   for (auto* window : windows) {
     wm::WindowState* window_state = window->GetWindowState();
     if (window_on_top)
       window_state->DisableAlwaysOnTop(window_on_top);
     else
       window_state->RestoreAlwaysOnTop();
   }
 }
 
 }  // namespace ash