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

content/common/application_setup.mojom

Index: content/common/application_setup.mojom
diff --git a/content/common/application_setup.mojom b/content/common/application_setup.mojom
index dc730633e70ef56d89314213d5fe7bf0f9a8c60d..ac0530689fc18eb42dc67e50d4245209f42afc52 100644
--- a/content/common/application_setup.mojom
+++ b/content/common/application_setup.mojom
@@ -7,6 +7,7 @@ module content;
 import "mojo/shell/public/interfaces/interface_provider.mojom";
 
 interface ApplicationSetup {
-  ExchangeInterfaceProviders(mojo.InterfaceProvider& remote_interfaces,
-                             mojo.InterfaceProvider local_interfaces);
+  ExchangeInterfaceProviders(
+      mojo.shell.mojom.InterfaceProvider& remote_interfaces,
+      mojo.shell.mojom.InterfaceProvider local_interfaces);
 };