Initial crack at new workspace behavior. Each workspace now has its

ash/wm/workspace/workspace2.h

Index: ash/wm/workspace/workspace2.h
diff --git a/ash/wm/workspace/workspace2.h b/ash/wm/workspace/workspace2.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_WORKSPACE2_H_
+#define ASH_WM_WORKSPACE_WORKSPACE_H_
+
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "base/basictypes.h"
+
+namespace aura {
+class Window;
+}
+
+namespace gfx {
+class Rect;
+}
+
+namespace ash {
+namespace internal {
+
+class WorkspaceEventFilter;
+class WorkspaceManager2;
+
+// Workspace is used to maintain either a single maximized windows (including
+// transients and other windows) or any number of windows (for the
+// desktop). Workspace is used by WorkspaceManager to manage a set of windows.
+class ASH_EXPORT Workspace2 {
+ public:
+  Workspace2(WorkspaceManager2* manager,
+             aura::Window* parent,
+             bool is_maximized);
+  ~Workspace2();
+
+  // Resets state. This should be used before destroying the Workspace.
+  aura::Window* ReleaseWindow();
+
+  bool is_maximized() const { return is_maximized_; }
+
+  aura::Window* window() { return window_; }
+
+  WorkspaceManager2* workspace_manager() { return workspace_manager_; }
+
+  void SetGridSize(int grid_size);
+
+  // Returns true if the Workspace should be moved to pending. This is true
+  // if there are no visible maximized windows.
+  bool ShouldMoveToPending() const;
+
+  // Returns the number of maximized windows (including minimized windows that
+  // would be maximized on restore). This does not consider visibility.
+  int GetNumMaximizedWindows() const;
+
+ private:
+  // Is this a workspace for maximized windows?
+  const bool is_maximized_;
+
+  WorkspaceManager2* workspace_manager_;
+
+  // Our Window, owned by |parent| passed to the constructor.
+  aura::Window* window_;
+
+  // Owned by |window_|.
+  WorkspaceEventFilter* event_filter_;
+
+  DISALLOW_COPY_AND_ASSIGN(Workspace2);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_WORKSPACE_WORKSPACE2_H_