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

ash/wm/workspace/phantom_window_controller.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/phantom_window_controller.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ skipping 106 matching lines @@
     phantom_widget_ = NULL;
   }
   if (!phantom_widget_)
     phantom_widget_ = CreatePhantomWidget(target_root, start_bounds_);
 
   // Create a secondary widget in a second screen if start_bounds_ lie at least
   // partially in that other screen. This allows animations to start or restart
   // in one root window and progress into another root.
   aura::Window* start_root = wm::GetRootWindowMatching(start_bounds_);
   if (start_root == target_root) {
-    Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
+    aura::Window::Windows root_windows = Shell::GetAllRootWindows();
     for (size_t i = 0; i < root_windows.size(); ++i) {
       if (root_windows[i] != target_root &&
           root_windows[i]->GetBoundsInScreen().Intersects(start_bounds_)) {
         start_root = root_windows[i];
         break;
       }
     }
   }
   if (phantom_widget_start_ &&
       (phantom_widget_start_->GetNativeWindow()->GetRootWindow() != start_root
@@ skipping 67 matching lines @@
   // Fade the window in.
   ui::Layer* widget_layer = phantom_widget->GetNativeWindow()->layer();
   widget_layer->SetOpacity(0);
   ui::ScopedLayerAnimationSettings scoped_setter(widget_layer->GetAnimator());
   widget_layer->SetOpacity(1);
   return phantom_widget;
 }
 
 }  // namespace internal
 }  // namespace ash