Move the concept of Activation to the Shell.

ui/aura_shell/workspace_controller.h

 // Copyright (c) 2011 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.
 
 #ifndef UI_AURA_SHELL_WORKSPACE_CONTROLLER_H_
 #define UI_AURA_SHELL_WORKSPACE_CONTROLLER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/root_window_observer.h"
+#include "ui/aura/window_observer.h"
 #include "ui/aura_shell/aura_shell_export.h"
 #include "ui/aura_shell/launcher/launcher_model_observer.h"
 #include "ui/aura_shell/workspace/workspace_observer.h"
 
 namespace aura {
 class Window;
 }
 
 namespace gfx {
 class Size;
 }
 
 namespace aura_shell {
 class LauncherModel;
 
 namespace internal {
 
 class WorkspaceManager;
 
 // WorkspaceControlls owns a WorkspaceManager. WorkspaceControlls bridges
 // events From RootWindowObserver translating them to WorkspaceManager, and
 // a move event between Laucher and Workspace.
 class AURA_SHELL_EXPORT WorkspaceController :
       public aura::RootWindowObserver,
+      public aura::WindowObserver,
       public aura_shell::internal::WorkspaceObserver,
       public aura_shell::LauncherModelObserver {
  public:
   explicit WorkspaceController(aura::Window* workspace_viewport);
   virtual ~WorkspaceController();
 
   void ToggleOverview();
 
   void SetLauncherModel(LauncherModel* launcher_model);
 
   // Returns the workspace manager that this controler owns.
   WorkspaceManager* workspace_manager() {
     return workspace_manager_.get();
   }
 
-  // RootWindowObserver overrides:
+  // aura::RootWindowObserver overrides:
   virtual void OnRootWindowResized(const gfx::Size& new_size) OVERRIDE;
-  virtual void OnActiveWindowChanged(aura::Window* active) OVERRIDE;
+
+  // aura::WindowObserver overrides:
+  virtual void OnWindowPropertyChanged(aura::Window* window,
+                                       const char* key,
+                                       void* old) OVERRIDE;
 
   // WorkspaceObserver overrides:
   virtual void WindowMoved(WorkspaceManager* manager,
                            aura::Window* source,
                            aura::Window* target) OVERRIDE;
   virtual void ActiveWorkspaceChanged(WorkspaceManager* manager,
                                       Workspace* old) OVERRIDE;
 
   // Invoked after an item has been added to the model.
   virtual void LauncherItemAdded(int index) OVERRIDE;
@@ skipping 11 matching lines @@
   // Used to prevent infinite recursive call between the workspace and launcher.
   bool ignore_move_event_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
 };
 
 }  // namespace internal
 }  // namespace aura_shell
 
 #endif  // UI_AURA_SHELL_WORKSPACE_CONTROLLER_H_