Re-implement overscan & Implement Display Rotation

ash/wm/workspace/workspace_layout_manager_unittest.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_layout_manager.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/property_util.h"
@@ skipping 120 matching lines @@
   bounds.Intersect(root_window_bounds);
   // 2/3 of the window must be visible.
   EXPECT_GT(bounds.width(), out_window->bounds().width() * 0.6);
   EXPECT_GT(bounds.height(), out_window->bounds().height() * 0.6);
 }
 
 // Verifies the size of a window is enforced to be smaller than the work area.
 TEST_F(WorkspaceLayoutManagerTest, SizeToWorkArea) {
   // Normal window bounds shouldn't be changed.
   gfx::Size work_area(
-      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().work_area().size());
+      Shell::GetScreen()->GetPrimaryDisplay().work_area().size());
   const gfx::Rect window_bounds(
       100, 101, work_area.width() + 1, work_area.height() + 2);
   scoped_ptr<aura::Window> window(
       CreateTestWindowInShellWithBounds(window_bounds));
   EXPECT_EQ(gfx::Rect(gfx::Point(100, 101), work_area).ToString(),
       window->bounds().ToString());
 
   // Directly setting the bounds triggers a slightly different code path. Verify
   // that too.
   window->SetBounds(window_bounds);
   EXPECT_EQ(gfx::Rect(gfx::Point(100, 101), work_area).ToString(),
       window->bounds().ToString());
 }
 
 }  // namespace
 }  // namespace ash