Add status area to Aura builds.

ui/aura_shell/shell.cc

 // Copyright (c) 2011 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 "ui/aura_shell/shell.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "ui/aura/aura_switches.h"
 #include "ui/aura/desktop.h"
@@ skipping 63 matching lines @@
 }
 
 }  // namespace
 
 // static
 Shell* Shell::instance_ = NULL;
 
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, public:
 
-Shell::Shell()
-    : ALLOW_THIS_IN_INITIALIZER_LIST(method_factory_(this)) {
+Shell::Shell(ShellDelegate* delegate)
+    : ALLOW_THIS_IN_INITIALIZER_LIST(method_factory_(this)),
+      delegate_(delegate) {
   aura::Desktop::GetInstance()->SetStackingClient(this);
 }
 
 Shell::~Shell() {
   // Make sure we delete WorkspaceController before launcher is
   // deleted as it has a reference to launcher model.
   workspace_controller_.reset();
 }
 
 // static
+Shell* Shell::CreateInstance(ShellDelegate* delegate) {
+  CHECK(!instance_);
+  instance_ = new Shell(delegate);
+  instance_->Init();
+  return instance_;
+}
+// static
 Shell* Shell::GetInstance() {
-  if (!instance_) {
-    instance_ = new Shell;
-    instance_->Init();
-  }
+  DCHECK(instance_);
   return instance_;
 }
 
 void Shell::Init() {
   aura::Desktop* desktop_window = aura::Desktop::GetInstance();
   desktop_window->SetCursor(aura::kCursorPointer);
 
   aura::Window::Windows containers;
   CreateSpecialContainers(&containers);
   aura::Window::Windows::const_iterator i;
   for (i = containers.begin(); i != containers.end(); ++i) {
     (*i)->Init(ui::Layer::LAYER_HAS_NO_TEXTURE);
     desktop_window->AddChild(*i);
     (*i)->Show();
   }
 
   internal::DesktopLayoutManager* desktop_layout =
       new internal::DesktopLayoutManager(desktop_window);
   desktop_window->SetLayoutManager(desktop_layout);
 
   desktop_layout->set_background_widget(internal::CreateDesktopBackground());
+
   aura::ToplevelWindowContainer* toplevel_container =
       GetContainer(internal::kShellWindowId_DefaultContainer)->
           AsToplevelWindowContainer();
   launcher_.reset(new Launcher(toplevel_container));
 
+  views::Widget* status_widget = NULL;
+  if (delegate_.get())
+    status_widget = delegate_->CreateStatusArea();
+  if (!status_widget)
+    status_widget = internal::CreateStatusArea();
+
   shelf_layout_controller_.reset(new internal::ShelfLayoutController(
-      launcher_->widget(), internal::CreateStatusArea()));
+      launcher_->widget(), status_widget));
+
   desktop_layout->set_shelf(shelf_layout_controller_.get());
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAuraWindows)) {
     EnableWorkspaceManager();
   } else {
     internal::ToplevelLayoutManager* toplevel_layout_manager =
         new internal::ToplevelLayoutManager();
     toplevel_container->SetLayoutManager(toplevel_layout_manager);
     toplevel_layout_manager->set_shelf(shelf_layout_controller_.get());
   }
 
   // Force a layout.
   desktop_layout->OnWindowResized();
 }
 
-void Shell::SetDelegate(ShellDelegate* delegate) {
-  delegate_.reset(delegate);
-}
-
 aura::Window* Shell::GetContainer(int container_id) {
   return const_cast<aura::Window*>(
       const_cast<const aura_shell::Shell*>(this)->GetContainer(container_id));
 }
 
 const aura::Window* Shell::GetContainer(int container_id) const {
   return aura::Desktop::GetInstance()->GetChildById(container_id);
 }
 
 void Shell::ToggleOverview() {
@@ skipping 41 matching lines @@
 }
 
 aura::Window* Shell::GetTopmostWindowToActivate(aura::Window* ignore) const {
   const aura::ToplevelWindowContainer* container =
       GetContainer(internal::kShellWindowId_DefaultContainer)->
           AsToplevelWindowContainer();
   return container->GetTopmostWindowToActivate(ignore);
 }
 
 }  // namespace aura_shell