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 {
+
+// Upon user resizing, at least this many pixels should remain visible on the

[sky, 2012/10/16 22:57:46]

resizing, moving or display area changing, right? Or maybe just say the number
of DIPs we force on screen.

[Mr4D (OOO till 08-26), 2012/10/17 00:05:17]

Done.

+// screen to avoid 'loosing' the window.
+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_