Move InterfaceProvider into the shell::mojom namespace like the rest of the shell interfaces.

mojo/shell/application_instance.h

Index: mojo/shell/application_instance.h
diff --git a/mojo/shell/application_instance.h b/mojo/shell/application_instance.h
index c7221932356c1607a2112ababd5a3cb36354ea5b..3d55f11ba4eccd79ac21697796528361b6988343 100644
--- a/mojo/shell/application_instance.h
+++ b/mojo/shell/application_instance.h
@@ -70,8 +70,8 @@ class ApplicationInstance : public mojom::Shell,
   // Shell implementation:
   void ConnectToApplication(
       URLRequestPtr app_request,
-      InterfaceRequest<InterfaceProvider> remote_interfaces,
-      InterfaceProviderPtr local_interfaces,
+      shell::mojom::InterfaceProviderRequest remote_interfaces,
+      shell::mojom::InterfaceProviderPtr local_interfaces,
       mojom::CapabilityFilterPtr filter,
       const ConnectToApplicationCallback& callback) override;
   void QuitApplication() override;