WidgetDelegateView is its own contents view.

ash/test/child_modal_window.cc

Index: ash/test/child_modal_window.cc
diff --git a/ash/test/child_modal_window.cc b/ash/test/child_modal_window.cc
index 40ab94e843469e41c01c14746fea7eab1039c812..fdee9f18373a5b8927b9b93aa3e321aa67043149 100644
--- a/ash/test/child_modal_window.cc
+++ b/ash/test/child_modal_window.cc
@@ -65,7 +65,6 @@ class ChildModalWindow : public views::WidgetDelegateView {
   gfx::Size GetPreferredSize() const override;
 
   // Overridden from WidgetDelegate:
-  View* GetContentsView() override;
   base::string16 GetWindowTitle() const override;
   bool CanResize() const override;
   ui::ModalType GetModalType() const override;
@@ -90,10 +89,6 @@ gfx::Size ChildModalWindow::GetPreferredSize() const {
   return gfx::Size(kChildWindowWidth, kChildWindowHeight);
 }
 
-views::View* ChildModalWindow::GetContentsView() {
-  return this;
-}
-
 base::string16 ChildModalWindow::GetWindowTitle() const {
   return base::ASCIIToUTF16("Examples: Child Modal Window");
 }
@@ -154,10 +149,6 @@ Widget* ChildModalParent::CreateChild() {
   return child;
 }
 
-views::View* ChildModalParent::GetContentsView() {
-  return this;
-}
-
 base::string16 ChildModalParent::GetWindowTitle() const {
   return base::ASCIIToUTF16("Examples: Child Modal Parent");
 }