WIP: Implement binding layer for Blink-in-JavaScript

Source/bindings/v8/DOMWrapperWorld.h

Index: Source/bindings/v8/DOMWrapperWorld.h
diff --git a/Source/bindings/v8/DOMWrapperWorld.h b/Source/bindings/v8/DOMWrapperWorld.h
index baf951eebe564036d54b20f4f9cee22bc41c43f9..45fd8b4c299def9ba6e85092cc4dd466bde8b018 100644
--- a/Source/bindings/v8/DOMWrapperWorld.h
+++ b/Source/bindings/v8/DOMWrapperWorld.h
@@ -49,13 +49,15 @@ class ExecutionContext;
 enum WorldIdConstants {
     MainWorldId = 0,
     EmbedderWorldIdLimit = (1 << 29),
-    ScriptPreprocessorIsolatedWorldId
+    ScriptPreprocessorIsolatedWorldId,
+    BlinkInJavaScriptIsolatedWorldId,
 };
 
 // This class represent a collection of DOM wrappers for a specific world.
 class DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
 public:
     static const int mainWorldExtensionGroup = 0;
+    static const int blinkInJavaScriptWorldExtensionGroup = 1;
     static PassRefPtr<DOMWrapperWorld> ensureIsolatedWorld(int worldId, int extensionGroup);
     ~DOMWrapperWorld();