Converts DockedWindowLayoutManager to common ash/wm types

ash/wm/dock/docked_window_layout_manager_unittest.cc

 // Copyright (c) 2013 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/dock/docked_window_layout_manager.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 252 matching lines @@
 
   gfx::Rect bounds(0, 0, 201, 201);
   std::unique_ptr<aura::Window> window(CreateTestWindow(bounds));
   DragRelativeToEdge(DOCKED_EDGE_LEFT, window.get(), 0);
 
   // The window should be attached and snapped to the right side of the screen.
   EXPECT_EQ(window->GetRootWindow()->bounds().x(),
             window->GetBoundsInScreen().x());
   EXPECT_EQ(kShellWindowId_DockedContainer, window->parent()->id());
 
-  DockedWindowLayoutManager* manager = static_cast<DockedWindowLayoutManager*>(
-      window->parent()->layout_manager());
+  DockedWindowLayoutManager* manager =
+      DockedWindowLayoutManager::Get(wm::WmWindowAura::Get(window.get()));
 
   // Create two additional windows and test their auto-placement
   std::unique_ptr<aura::Window> window1(CreateTestWindowInShellWithId(1));
   gfx::Rect desktop_area = window1->parent()->bounds();
   wm::GetWindowState(window1.get())->set_window_position_managed(true);
   window1->Hide();
   window1->SetBounds(gfx::Rect(250, 32, 231, 320));
   window1->Show();
   // |window1| should be centered in work area.
   EXPECT_EQ(base::IntToString(
@@ skipping 28 matching lines @@
 
   gfx::Rect bounds(0, 0, 201, 201);
   std::unique_ptr<aura::Window> window(CreateTestWindow(bounds));
   DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
 
   // The window should be attached and snapped to the right side of the screen.
   EXPECT_EQ(window->GetRootWindow()->bounds().right(),
             window->GetBoundsInScreen().right());
   EXPECT_EQ(kShellWindowId_DockedContainer, window->parent()->id());
 
-  DockedWindowLayoutManager* manager = static_cast<DockedWindowLayoutManager*>(
-      window->parent()->layout_manager());
+  DockedWindowLayoutManager* manager =
+      DockedWindowLayoutManager::Get(wm::WmWindowAura::Get(window.get()));
 
   // Create two additional windows and test their auto-placement
   std::unique_ptr<aura::Window> window1(CreateTestWindowInShellWithId(1));
   gfx::Rect desktop_area = window1->parent()->bounds();
   wm::GetWindowState(window1.get())->set_window_position_managed(true);
   window1->Hide();
   window1->SetBounds(gfx::Rect(16, 32, 231, 320));
   window1->Show();
 
   // |window1| should be centered in work area.
@@ skipping 32 matching lines @@
   gfx::Rect bounds(600, 0, 201, 201);
   std::unique_ptr<aura::Window> window(CreateTestWindow(bounds));
   // Drag pointer to the right edge of the second screen.
   DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
 
   // The window should be attached and snapped to the right side of the screen.
   EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
             window->GetBoundsInScreen().right());
   EXPECT_EQ(kShellWindowId_DockedContainer, window->parent()->id());
 
-  DockedWindowLayoutManager* manager = static_cast<DockedWindowLayoutManager*>(
-      window->parent()->layout_manager());
+  DockedWindowLayoutManager* manager =
+      DockedWindowLayoutManager::Get(wm::WmWindowAura::Get(window.get()));
 
   // Create two additional windows and test their auto-placement
   bounds = gfx::Rect(616, 32, 231, 320);
   std::unique_ptr<aura::Window> window1(
       CreateTestWindowInShellWithDelegate(nullptr, 1, bounds));
   gfx::Rect desktop_area = window1->parent()->bounds();
   wm::GetWindowState(window1.get())->set_window_position_managed(true);
   window1->Hide();
   window1->Show();
 
@@ skipping 472 matching lines @@
   EXPECT_EQ(work_area.height(), window->GetBoundsInScreen().height());
 }
 
 // Tests run twice - on both panels and normal windows
 INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                         DockedWindowLayoutManagerTest,
                         testing::Values(ui::wm::WINDOW_TYPE_NORMAL,
                                         ui::wm::WINDOW_TYPE_PANEL));
 
 }  // namespace ash