mash: Reverse the responsibilities of the NewWindowClient.

chrome/browser/ui/ash/chrome_new_window_client.h

Index: chrome/browser/ui/ash/chrome_new_window_client.h
diff --git a/chrome/browser/ui/ash/chrome_new_window_client.h b/chrome/browser/ui/ash/chrome_new_window_client.h
index d07e64070084263124f87f33b46f014c97903878..f8bcb0f59473e8565f95cf94f39643b1a1982404 100644
--- a/chrome/browser/ui/ash/chrome_new_window_client.h
+++ b/chrome/browser/ui/ash/chrome_new_window_client.h
@@ -9,6 +9,7 @@
 
 #include "ash/public/interfaces/new_window.mojom.h"
 #include "base/macros.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
 
 class ChromeNewWindowClient : public ash::mojom::NewWindowClient {
  public:
@@ -31,6 +32,11 @@ class ChromeNewWindowClient : public ash::mojom::NewWindowClient {
 
   std::unique_ptr<TabRestoreHelper> tab_restore_helper_;
 
+  ash::mojom::NewWindowControllerPtr new_window_controller_;
+
+  // Binds this object to the client interface.
+  mojo::AssociatedBinding<ash::mojom::NewWindowClient> binding_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeNewWindowClient);
 };