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diff --git a/chromium/ash/wm/workspace_controller.h b/chromium/ash/wm/workspace_controller.h
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+++ b/chromium/ash/wm/workspace_controller.h
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+// 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.
+
+#ifndef ASH_WM_WORKSPACE_CONTROLLER_H_
+#define ASH_WM_WORKSPACE_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "ash/wm/workspace/workspace_types.h"
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace aura {
+class Window;
+}
+
+namespace ash {
+namespace internal {
+
+class ShelfLayoutManager;
+class WorkspaceControllerTestHelper;
+class WorkspaceEventHandler;
+class WorkspaceLayoutManager;
+
+// WorkspaceController acts as a central place that ties together all the
+// various workspace pieces.
+class ASH_EXPORT WorkspaceController {
+ public:
+  explicit WorkspaceController(aura::Window* viewport);
+  virtual ~WorkspaceController();
+
+  // Returns the current window state.
+  WorkspaceWindowState GetWindowState() const;
+
+  void SetShelf(ShelfLayoutManager* shelf);
+
+  // Starts the animation that occurs on first login.
+  void DoInitialAnimation();
+
+ private:
+  friend class WorkspaceControllerTestHelper;
+
+  aura::Window* viewport_;
+
+  internal::ShelfLayoutManager* shelf_;
+  scoped_ptr<internal::WorkspaceEventHandler> event_handler_;
+  internal::WorkspaceLayoutManager* layout_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_WORKSPACE_CONTROLLER_H_