Implement a module system for the extension bindings JS.

chrome/renderer/extensions/extension_dispatcher.h

Index: chrome/renderer/extensions/extension_dispatcher.h
diff --git a/chrome/renderer/extensions/extension_dispatcher.h b/chrome/renderer/extensions/extension_dispatcher.h
index 97964302b41e99726f42521fc17514cd447d3aa7..bd26037b2bb2582f44341fa41243a37e40d9f566 100644
--- a/chrome/renderer/extensions/extension_dispatcher.h
+++ b/chrome/renderer/extensions/extension_dispatcher.h
@@ -17,6 +17,7 @@
 #include "chrome/renderer/extensions/chrome_v8_context_set.h"
 #include "v8/include/v8.h"
 
+class ModuleSystem;
 class GURL;
 class URLPattern;
 class UserScriptSlave;
@@ -137,6 +138,10 @@ class ExtensionDispatcher : public content::RenderProcessObserver {
                                const Extension* extension,
                                const URLPatternSet& origins);
 
+  void RegisterNativeHandlers(ModuleSystem* module_system,
+                              ChromeV8Context* context,
+                              bool is_bindings_allowed);
+
   // Finds the extension ID for the current context. This is determined from
   // |world_id| if it's non-zero, or the URL in |frame| if it is.
   std::string GetExtensionID(WebKit::WebFrame* frame, int world_id);