Mojo C++ bindings: make the generator use STL/WTF string/vector/map by default.

url/mojo/BUILD.gn

Index: url/mojo/BUILD.gn
diff --git a/url/mojo/BUILD.gn b/url/mojo/BUILD.gn
index 7d5e5d6984e6233f14bcba8d9f90ce5963481e8a..d9788741f254185e4834f51067f6a1e93374f321 100644
--- a/url/mojo/BUILD.gn
+++ b/url/mojo/BUILD.gn
@@ -8,6 +8,8 @@ mojom("url_mojom_gurl") {
   sources = [
     "url.mojom",
   ]
+
+  use_new_wrapper_types = false
 }
 
 mojom("url_mojom_origin") {
@@ -18,6 +20,8 @@ mojom("url_mojom_origin") {
   public_deps = [
     ":url_mojom_gurl",
   ]
+
+  use_new_wrapper_types = false
 }
 
 mojom("test_url_mojom_gurl") {
@@ -29,4 +33,6 @@ mojom("test_url_mojom_gurl") {
     ":url_mojom_gurl",
     ":url_mojom_origin",
   ]
+
+  use_new_wrapper_types = false
 }