Revert of Move content's shell connections to the IO thread

services/navigation/view_impl.h

Index: services/navigation/view_impl.h
diff --git a/services/navigation/view_impl.h b/services/navigation/view_impl.h
index 2e0d81f888dc590d007fb9c9ef6d13b1d1a49ba9..2a3fc311932828f785c93ff4079f1d72f1bbe96c 100644
--- a/services/navigation/view_impl.h
+++ b/services/navigation/view_impl.h
@@ -4,8 +4,6 @@
 
 #ifndef SERVICES_NAVIGATION_VIEW_IMPL_H_
 #define SERVICES_NAVIGATION_VIEW_IMPL_H_
-
-#include <memory>
 
 #include "base/macros.h"
 #include "content/public/browser/notification_observer.h"
@@ -34,7 +32,7 @@
                  public ui::WindowTreeClientDelegate,
                  public views::WidgetDelegate {
  public:
-  ViewImpl(std::unique_ptr<shell::Connector> connector,
+  ViewImpl(shell::Connector* connector,
            const std::string& client_user_id,
            mojom::ViewClientPtr client,
            mojom::ViewRequest request,
@@ -89,7 +87,7 @@
   views::Widget* GetWidget() override;
   const views::Widget* GetWidget() const override;
 
-  std::unique_ptr<shell::Connector> connector_;
+  shell::Connector* connector_;
   mojo::StrongBinding<mojom::View> binding_;
   mojom::ViewClientPtr client_;
   std::unique_ptr<shell::ShellConnectionRef> ref_;