Fix DCHECK error when using multi window resizer on the 2nd display that is place on the left side.

ash/wm/workspace/workspace_window_resizer.cc

 // 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.
 
 #include "ash/wm/workspace/workspace_window_resizer.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "ash/display/display_controller.h"
@@ skipping 265 matching lines @@
   if (snap_phantom_window_controller_.get() &&
       snap_phantom_window_controller_->IsShowing()) {
     return snap_phantom_window_controller_->bounds();
   }
   return AdjustBoundsToGrid(bounds, grid_size);
 }
 
 void WorkspaceWindowResizer::LayoutAttachedWindows(
     const gfx::Rect& bounds,
     int grid_size) {
-  gfx::Rect work_area(
-      gfx::Screen::GetDisplayNearestWindow(window()).work_area());
+  // |bounds| and |work_area| are in |window()->parent()|'s coordinates.

[sky, 2012/08/09 15:57:33]

Remove comment since coordinate system is documented in the header.

[mazda, 2012/08/09 16:08:50]

Done.

+  gfx::Rect work_area(ScreenAsh::GetDisplayWorkAreaBoundsInParent(window()));
   std::vector<int> sizes;
   CalculateAttachedSizes(
       PrimaryAxisSize(details_.initial_bounds.size()),
       PrimaryAxisSize(bounds.size()),
       PrimaryAxisCoordinate(bounds.right(), bounds.bottom()),
       PrimaryAxisCoordinate(work_area.right(), work_area.bottom()),
       grid_size,
       &sizes);
   DCHECK_EQ(attached_windows_.size(), sizes.size());
   int last = PrimaryAxisCoordinate(bounds.right(), bounds.bottom());
@@ skipping 240 matching lines @@
 }
 
 bool WorkspaceWindowResizer::ShouldAllowMouseWarp() const {
   return (details_.window_component == HTCAPTION) &&
       (window()->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_NONE) &&
       (window()->type() == aura::client::WINDOW_TYPE_NORMAL);
 }
 
 }  // namespace internal
 }  // namespace ash