Update bindings gn files for binding modularization.

Source/bindings/core/core.gni

Index: Source/bindings/core/core.gni
diff --git a/Source/bindings/core/core.gni b/Source/bindings/core/core.gni
index 8cfaf086e26d78ac2c7f63521a0256e12a01e7db..1c363cf5fceeb6ff8138f4775bc047bd9b3564e8 100644
--- a/Source/bindings/core/core.gni
+++ b/Source/bindings/core/core.gni
@@ -4,5 +4,19 @@
 
 # FIXME: factor out bindings_core http://crbug.com/358074
 import("//third_party/WebKit/Source/bindings/bindings.gni")
+import("//third_party/WebKit/Source/core/core.gni")
 
 bindings_core_output_dir = "$bindings_output_dir/core"
+
+# Global constructors
+core_global_constructors_generated_idl_files = [
+  "$blink_core_output_dir/WindowCoreConstructors.idl",
+  "$blink_core_output_dir/SharedWorkerGlobalScopeCoreConstructors.idl",
+  "$blink_core_output_dir/DedicatedWorkerGlobalScopeCoreConstructors.idl",
+]
+
+core_global_constructors_generated_header_files = [
+  "$blink_core_output_dir/WindowCoreConstructors.h",
+  "$blink_core_output_dir/SharedWorkerGlobalScopeCoreConstructors.h",
+  "$blink_core_output_dir/DedicatedWorkerGlobalScopeCoreConstructors.h",
+]