Rename GetRootWindow() -> GetPrimaryRootWindow()

ash/wm/panel_layout_manager.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/panel_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/launcher/launcher.h"
 #include "ash/shell.h"
@@ skipping 73 matching lines @@
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.parent = panel_container_;
   params.bounds.set_width(kArrowWidth);
   params.bounds.set_height(kArrowHeight);
   // Why do we need this and can_activate = false?
   callout_widget_->set_focus_on_creation(false);
   callout_widget_->Init(params);
   views::View* content_view = new views::View;
   content_view->set_background(new CalloutWidgetBackground);
   callout_widget_->SetContentsView(content_view);
-  Shell::GetRootWindow()->AddObserver(this);
+  Shell::GetPrimaryRootWindow()->AddObserver(this);
 }
 
 PanelLayoutManager::~PanelLayoutManager() {
   if (launcher_)
     launcher_->RemoveIconObserver(this);
-  Shell::GetRootWindow()->RemoveObserver(this);
+  Shell::GetPrimaryRootWindow()->RemoveObserver(this);
 }
 
 void PanelLayoutManager::StartDragging(aura::Window* panel) {
   DCHECK(!dragged_panel_);
   DCHECK(panel->parent() == panel_container_);
   dragged_panel_ = panel;
 }
 
 void PanelLayoutManager::FinishDragging() {
   DCHECK(dragged_panel_);
@@ skipping 242 matching lines @@
   callout_bounds.set_x(
       bounds.x() + (bounds.width() - callout_bounds.width()) / 2);
   callout_bounds.set_y(bounds.bottom());
   SetChildBoundsDirect(callout_widget_->GetNativeWindow(), callout_bounds);
   panel_container_->StackChildAtTop(callout_widget_->GetNativeWindow());
   callout_widget_->Show();
 }
 
 }  // namespace internal
 }  // namespace ash