Removes a couple more functions from WmWindow

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 54 matching lines @@
   if (!window_state->IsNormalOrSnapped())
     return std::unique_ptr<WindowResizer>();
 
   int bounds_change =
       WindowResizer::GetBoundsChangeForWindowComponent(window_component);
   if (bounds_change == WindowResizer::kBoundsChangeDirection_None)
     return std::unique_ptr<WindowResizer>();
 
   window_state->CreateDragDetails(point_in_parent, window_component, source);
   const int parent_shell_window_id =
-      window->GetParent() ? window->GetParent()->GetShellWindowId() : -1;
+      window->GetParent() ? window->GetParent()->aura_window()->id() : -1;
   if (window->GetParent() &&
       (parent_shell_window_id == kShellWindowId_DefaultContainer ||
        parent_shell_window_id == kShellWindowId_PanelContainer)) {
     window_resizer.reset(
         WorkspaceWindowResizer::Create(window_state, std::vector<WmWindow*>()));
   } else {
     window_resizer.reset(DefaultWindowResizer::Create(window_state));
   }
   window_resizer = ShellPort::Get()->CreateDragWindowResizer(
       std::move(window_resizer), window_state);
@@ skipping 862 matching lines @@
   DCHECK(snapped_type == wm::WINDOW_STATE_TYPE_LEFT_SNAPPED ||
          snapped_type == wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED);
   gfx::Rect snapped_bounds = wm::GetDisplayWorkAreaBoundsInParent(GetTarget());
   if (snapped_type == wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED)
     snapped_bounds.set_x(snapped_bounds.right() - bounds_in_parent.width());
   snapped_bounds.set_width(bounds_in_parent.width());
   return bounds_in_parent == snapped_bounds;
 }
 
 }  // namespace ash