Move mojom definitions of URL{Request,Response} into SDK

mojo/services/network/public/interfaces/BUILD.gn

Index: mojo/services/network/public/interfaces/BUILD.gn
diff --git a/mojo/services/network/public/interfaces/BUILD.gn b/mojo/services/network/public/interfaces/BUILD.gn
index eda4dd7759e16fd100a0b7b4007ef777cb77b916..c13dfb53e8ba5bd44b79cda593e6f4e534fc1320 100644
--- a/mojo/services/network/public/interfaces/BUILD.gn
+++ b/mojo/services/network/public/interfaces/BUILD.gn
@@ -12,7 +12,6 @@ mojom("interfaces") {
     "http_message.mojom",
     "http_server.mojom",
     "net_address.mojom",
-    "network_error.mojom",
     "network_service.mojom",
     "tcp_bound_socket.mojom",
     "tcp_connected_socket.mojom",
@@ -22,5 +21,7 @@ mojom("interfaces") {
     "web_socket.mojom",
   ]
 
+  mojo_sdk_deps = [ "mojo/public/interfaces/network" ]
+
   import_dirs = [ get_path_info("../../../", "abspath") ]
 }