WidgetDelegateView is its own contents view.

ash/shell/window_type_launcher.cc

Index: ash/shell/window_type_launcher.cc
diff --git a/ash/shell/window_type_launcher.cc b/ash/shell/window_type_launcher.cc
index b7932b875545e8aaf0391122ca34fb8c9f6a13ae..4e3692f94648849b175a9a466207f88ebbd2682a 100644
--- a/ash/shell/window_type_launcher.cc
+++ b/ash/shell/window_type_launcher.cc
@@ -77,7 +77,6 @@ class ModalWindow : public views::WidgetDelegateView,
   }
 
   // Overridden from views::WidgetDelegate:
-  views::View* GetContentsView() override { return this; }
   bool CanResize() const override { return true; }
   base::string16 GetWindowTitle() const override {
     return base::ASCIIToUTF16("Modal Window");
@@ -131,7 +130,6 @@ class NonModalTransient : public views::WidgetDelegateView {
   gfx::Size GetPreferredSize() const override { return gfx::Size(250, 250); }
 
   // Overridden from views::WidgetDelegate:
-  views::View* GetContentsView() override { return this; }
   bool CanResize() const override { return true; }
   base::string16 GetWindowTitle() const override {
     return base::ASCIIToUTF16("Non-Modal Transient");
@@ -240,10 +238,6 @@ bool WindowTypeLauncher::OnMousePressed(const ui::MouseEvent& event) {
   return true;
 }
 
-views::View* WindowTypeLauncher::GetContentsView() {
-  return this;
-}
-
 bool WindowTypeLauncher::CanResize() const {
   return true;
 }