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

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

Index: mojo/services/content_handler/public/interfaces/BUILD.gn
diff --git a/mojo/services/content_handler/public/interfaces/BUILD.gn b/mojo/services/content_handler/public/interfaces/BUILD.gn
index c58507a1f7de5a7a6d3aae41cb6bf13fd32db767..be214e0e7ad074e6daed6e2e5af485db04d210af 100644
--- a/mojo/services/content_handler/public/interfaces/BUILD.gn
+++ b/mojo/services/content_handler/public/interfaces/BUILD.gn
@@ -12,15 +12,8 @@ mojom("interfaces") {
 
   import_dirs = [ get_path_info("../../../", "abspath") ]
 
-  if (defined(mojo_network_service_root)) {
-    import_dirs += [ mojo_network_service_root ]
-  } else {
-    mojo_network_service_root = "../../.."
-  }
-
-  deps = [
-    "$mojo_network_service_root/network/public/interfaces",
+  mojo_sdk_deps = [
+    "mojo/public/interfaces/application",
+    "mojo/public/interfaces/network",
   ]
-
-  mojo_sdk_deps = [ "mojo/public/interfaces/application" ]
 }