Move shell interfaces into the shell.mojom namespace.

mojo/shell/package_manager.h

Index: mojo/shell/package_manager.h
diff --git a/mojo/shell/package_manager.h b/mojo/shell/package_manager.h
index 922c56f564978fd16a2aea8730f85e8e8e169453..1ffae7531d799090d2860cc60818640a5d799e96 100644
--- a/mojo/shell/package_manager.h
+++ b/mojo/shell/package_manager.h
@@ -52,7 +52,7 @@ class PackageManager {
       const Identity& source,
       const GURL& target_url,
       const CapabilityFilter& target_filter,
-      InterfaceRequest<Application>* application_request) = 0;
+      InterfaceRequest<shell::mojom::Application>* application_request) = 0;
 
   // Returns true if a manifest for |url| exists within the PackageManager's
   // application catalog.