Adds an interface between WorkspaceController and

ash/wm/workspace/base_workspace_manager.h

Index: ash/wm/workspace/base_workspace_manager.h
diff --git a/ash/wm/workspace/base_workspace_manager.h b/ash/wm/workspace/base_workspace_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..bce6650684db83e72f465e91258ac9b7b762d245
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+++ b/ash/wm/workspace/base_workspace_manager.h
@@ -0,0 +1,50 @@
+// 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_BASE_WORKSPACE_MANAGER_H_
+#define ASH_WM_WORKSPACE_BASE_WORKSPACE_MANAGER_H_
+
+#include "ash/ash_export.h"
+#include "ash/wm/workspace/workspace_types.h"
+
+namespace aura {
+class Window;
+}
+
+namespace ash {
+namespace internal {
+
+class ShelfLayoutManager;
+
+// TODO: this is temporary until WorkspaceManager2 is the default.
+class ASH_EXPORT BaseWorkspaceManager {
+ public:
+  virtual ~BaseWorkspaceManager() {}
+
+  // Returns true if in maximized or fullscreen mode.
+  virtual bool IsInMaximizedMode() const = 0;
+
+  // Sets the size of the grid. Newly added windows are forced to align to the
+  // size of the grid.
+  virtual void SetGridSize(int size) = 0;
+  virtual int GetGridSize() const = 0;
+
+  // Returns the current window state.
+  virtual WorkspaceWindowState GetWindowState() const = 0;
+
+  virtual void SetShelf(ShelfLayoutManager* shelf) = 0;
+
+  // Activates the workspace containing |window|. Does nothing if |window| is
+  // NULL or not contained in a workspace.
+  virtual void SetActiveWorkspaceByWindow(aura::Window* window) = 0;
+
+  // Returns the parent for |window|. This is invoked from StackingController
+  // when a new Window is being added.
+  virtual aura::Window* GetParentForNewWindow(aura::Window* window) = 0;
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_WORKSPACE_BASE_WORKSPACE_MANAGER_H_