Call ShowRootWindow on NativeWindow's RootWindow to display the window.

content/shell/shell_aura.cc

Index: content/shell/shell_aura.cc
diff --git a/content/shell/shell_aura.cc b/content/shell/shell_aura.cc
index a0986c47192f0faab60f726e00ee5c95152a4285..be2a8b6269251d88ccd197376ba4a060e6d4852d 100644
--- a/content/shell/shell_aura.cc
+++ b/content/shell/shell_aura.cc
@@ -283,9 +283,12 @@ void Shell::PlatformInitialize() {
   chromeos::DBusThreadManager::Initialize();
 #endif
 #if defined(OS_CHROMEOS)
-  stacking_client_ = new content::ShellStackingClientAsh();
   gfx::Screen::SetScreenInstance(
       gfx::SCREEN_TYPE_NATIVE, new aura::TestScreen);
+  scoped_ptr<aura::RootWindow> root_window =
+      CreateRootWindow(kTestWindowWidth, kTestWindowHeight);
+  stacking_client_ =
+      new content::ShellStackingClientAsh(root_window.Pass());
 #else
   stacking_client_ = new views::DesktopStackingClient();
   gfx::Screen::SetScreenInstance(
@@ -295,6 +298,14 @@ void Shell::PlatformInitialize() {
   views_delegate_ = new ShellViewsDelegateAura();
 }
 
+// static
+scoped_ptr<aura::RootWindow> Shell::CreateRootWindow(int width, int height) {
+  scoped_ptr<aura::RootWindow> root_window(new aura::RootWindow(
+      aura::RootWindow::CreateParams(gfx::Rect(0, 0, width, height))));
+  root_window->Init();
+  return root_window.Pass();
+}
+
 void Shell::PlatformExit() {
   if (stacking_client_)
     delete stacking_client_;
@@ -335,9 +346,16 @@ void Shell::PlatformSetIsLoading(bool loading) {
 
 void Shell::PlatformCreateWindow(int width, int height) {
   window_widget_ =
-      views::Widget::CreateWindowWithBounds(new ShellWindowDelegateView(this),
-               gfx::Rect(0, 0, width, height));
+      views::Widget::CreateWindowWithContextAndBounds(
+          new ShellWindowDelegateView(this),
+          Shell::stacking_client_->GetDefaultParent(
+              NULL, NULL, gfx::Rect()),
+          gfx::Rect(0, 0, width, height));
   window_ = window_widget_->GetNativeWindow();
+  // RootWindow created via CreateRootWindow doesn't get a
+  // ShowRootWindow call, hence its XWindow doesn't get mapped.
+  // Explicitly call the ShowRootWindow on RootWindow for now.
+  window_->GetRootWindow()->ShowRootWindow();
   window_widget_->Show();
 }