Mojo: Remove url type converters.

net/interfaces/proxy_resolver_service.mojom

Index: net/interfaces/proxy_resolver_service.mojom
diff --git a/net/interfaces/proxy_resolver_service.mojom b/net/interfaces/proxy_resolver_service.mojom
index f6656fa1da08b7f0887cc32ffff788a56d5e5643..2ae84e14e8fa140a758e1b45c68aa51fb209f7e8 100644
--- a/net/interfaces/proxy_resolver_service.mojom
+++ b/net/interfaces/proxy_resolver_service.mojom
@@ -8,6 +8,7 @@
 module net.interfaces;
 
 import "host_resolver_service.mojom";
+import "url/mojo/url.mojom";
 
 // Mirror of net::ProxyServer::Scheme.
 enum ProxyScheme {
@@ -32,7 +33,7 @@ struct ProxyServer {
 interface ProxyResolver {
   // Use a ProxyResolverRequestClient instead of returning a result so we can
   // cancel in-flight requests by destroying the client.
-  GetProxyForUrl(string url, ProxyResolverRequestClient client);
+  GetProxyForUrl(url.mojom.Url url, ProxyResolverRequestClient client);
 };
 
 interface ProxyResolverRequestClient {