Mojo C++ bindings: add a new mode to generator to use native STL/WTF types

mojo/public/interfaces/bindings/tests/BUILD.gn

Index: mojo/public/interfaces/bindings/tests/BUILD.gn
diff --git a/mojo/public/interfaces/bindings/tests/BUILD.gn b/mojo/public/interfaces/bindings/tests/BUILD.gn
index 635b615f70e3e3c164aa9c20837a3b6cb0880932..0a4807667632f7467865acd2d68db9a369ed3844 100644
--- a/mojo/public/interfaces/bindings/tests/BUILD.gn
+++ b/mojo/public/interfaces/bindings/tests/BUILD.gn
@@ -27,6 +27,8 @@ mojom("test_interfaces") {
     ":test_mojom_import",
     ":test_mojom_import2",
   ]
+
+  use_new_wrapper_types = true
 }
 
 mojom("test_mojom_import") {
@@ -34,6 +36,7 @@ mojom("test_mojom_import") {
   sources = [
     "sample_import.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("test_mojom_import_wrapper") {
@@ -59,6 +62,7 @@ mojom("test_mojom_import2") {
     ":test_mojom_import",
     ":test_mojom_import_wrapper_wrapper",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("test_struct_traits_interfaces") {
@@ -66,6 +70,7 @@ mojom("test_struct_traits_interfaces") {
   sources = [
     "struct_with_traits.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("test_interfaces_experimental") {
@@ -73,6 +78,7 @@ mojom("test_interfaces_experimental") {
   sources = [
     "test_unions.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("test_associated_interfaces") {
@@ -83,6 +89,7 @@ mojom("test_associated_interfaces") {
     "test_associated_interfaces.mojom",
     "validation_test_associated_interfaces.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("versioning_test_service_interfaces") {
@@ -90,6 +97,7 @@ mojom("versioning_test_service_interfaces") {
   sources = [
     "versioning_test_service.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("versioning_test_client_interfaces") {
@@ -97,6 +105,7 @@ mojom("versioning_test_client_interfaces") {
   sources = [
     "versioning_test_client.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("test_wtf_types") {
@@ -105,6 +114,7 @@ mojom("test_wtf_types") {
   sources = [
     "test_wtf_types.mojom",
   ]
+  use_new_wrapper_types = true
 }
 
 mojom("test_no_sources") {