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

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 <utility>
 #include <vector>
@@ skipping 723 matching lines @@
     }
     window_tracker_.Remove(magnetism_window_);
     magnetism_window_ = NULL;
   }
 
   // Avoid magnetically snapping to popups, menus, tooltips, controls and
   // windows that are not tracked by workspace.
   if (!window_state()->CanResize() || !window_state()->tracked_by_workspace())
     return false;
 
-  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
-  for (Shell::RootWindowList::iterator iter = root_windows.begin();
+  aura::Window::Windows root_windows = Shell::GetAllRootWindows();
+  for (aura::Window::Windows::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter) {
-    const aura::RootWindow* root_window = *iter;
+    const aura::Window* root_window = *iter;
     // Test all children from the desktop in each root window.
     const aura::Window::Windows& children = Shell::GetContainer(
         root_window, kShellWindowId_DefaultContainer)->children();
     for (aura::Window::Windows::const_reverse_iterator i = children.rbegin();
          i != children.rend() && !matcher.AreEdgesObscured(); ++i) {
       wm::WindowState* other_state = wm::GetWindowState(*i);
       if (other_state->window() == window() ||
           !other_state->window()->IsVisible() ||
           !other_state->IsNormalShowState() ||
           !other_state->CanResize()) {
@@ skipping 251 matching lines @@
     if (!dock_layout_->is_dragged_window_docked())
       dock_layout_->DockDraggedWindow(window());
   } else {
     if (dock_layout_->is_dragged_window_docked())
       dock_layout_->UndockDraggedWindow();
   }
 }
 
 }  // namespace internal
 }  // namespace ash