Dont allow the user to 'resize a window out of the workarea'

ash/wm/workspace/workspace_layout_manager2.h

 // 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_WORKSPACE_LAYOUT_MANAGER2_H_
 #define ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER2_H_
 
 #include <set>
 
 #include "ash/shell_observer.h"
 #include "ash/wm/base_layout_manager.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/root_window_observer.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/rect.h"
 
 namespace aura {
 class RootWindow;
 class Window;
 }
 
 namespace ui {
 class Layer;
 }
 
 namespace ash {
+
+// We force at least this many DIPs for any window on the screen.
+const int kMinimumOnScreenArea = 10;
+
 namespace internal {
 
 class Workspace2;
 class WorkspaceManager2;
 
 // LayoutManager used on the window created for a Workspace.
 // TODO(sky): this code shares a fair amount of similarities with
 // BaseLayoutManager, yet its different enough that subclassing is painful.
 // See if I can refactor the code to make it easier to share common bits.
 class ASH_EXPORT WorkspaceLayoutManager2
@@ skipping 78 matching lines @@
   // workspace switch.
   gfx::Rect work_area_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager2);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER2_H_