Eliminate Shell::RootWindowList in favor of aura::Window::Windows.

ash/wm/dock/docked_window_resizer_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_resizer.h"
 
 #include "ash/ash_switches.h"
 #include "ash/launcher/launcher.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/root_window_controller.h"
@@ skipping 592 matching lines @@
   DragRevert();
   EXPECT_EQ(previous_container_id, window->parent()->id());
 }
 
 // Move a docked window to the second display
 TEST_P(DockedWindowResizerTest, DragAcrossDisplays) {
   if (!SupportsMultipleDisplays())
     return;
 
   UpdateDisplay("800x800,800x800");
-  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
+  aura::Window::Windows root_windows = Shell::GetAllRootWindows();
   EXPECT_EQ(2, static_cast<int>(root_windows.size()));
   scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
   gfx::Rect initial_bounds = window->GetBoundsInScreen();
   EXPECT_EQ(root_windows[0], window->GetRootWindow());
 
   DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
   // The window should be attached and snapped to the right edge.
   EXPECT_EQ(window->GetRootWindow()->bounds().right(),
             window->GetBoundsInScreen().right());
   EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
@@ skipping 543 matching lines @@
             child->GetBoundsInScreen().origin().ToString());
 }
 
 // Tests run twice - on both panels and normal windows
 INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                         DockedWindowResizerTest,
                         testing::Values(aura::client::WINDOW_TYPE_NORMAL,
                                         aura::client::WINDOW_TYPE_PANEL));
 }  // namespace internal
 }  // namespace ash