Update bindings gn files for binding modularization.

Source/bindings/modules/modules.gni

Index: Source/bindings/modules/modules.gni
diff --git a/Source/bindings/modules/modules.gni b/Source/bindings/modules/modules.gni
index 649abde724a749f05dd573ff9dcae4794f0350d9..3f1251994ab6490a5452c006f039cd3e732f1293 100644
--- a/Source/bindings/modules/modules.gni
+++ b/Source/bindings/modules/modules.gni
@@ -4,5 +4,32 @@
 
 # FIXME: factor out bindings_core http://crbug.com/358074
 import("//third_party/WebKit/Source/bindings/bindings.gni")
+import("//third_party/WebKit/Source/modules/modules.gni")
+
+bindings_modules_output_dir = "$bindings_output_dir/modules"
+
+modules_core_global_constructors_original_interfaces = [
+  "ServiceWorkerGlobalScope",
+]
+
+modules_global_constructors_original_interfaces = [
+  "Window",
+  "SharedWorkerGlobalScope",
+  "DedicatedWorkerGlobalScope",
+  "ServiceWorkerGlobalScope",
+]
+
+modules_core_global_constructors_generated_idl_files = []
+foreach (interface, modules_core_global_constructors_original_interfaces) {
+  modules_core_global_constructors_generated_idl_files += [
+    "$blink_modules_output_dir/${interface}CoreConstructors.idl"
+  ]
+}
+
+modules_global_constructors_generated_idl_files = []
+foreach (interface, modules_global_constructors_original_interfaces) {
+  modules_global_constructors_generated_idl_files += [
+    "$blink_modules_output_dir/${interface}ModulesConstructors.idl"
+  ]
+}
 
-bindings_modules_output_dir = "$bindings_output_dir/bindings/modules"