Implement a module system for the extension bindings JS.

chrome/renderer/extensions/chrome_v8_context.h

Index: chrome/renderer/extensions/chrome_v8_context.h
diff --git a/chrome/renderer/extensions/chrome_v8_context.h b/chrome/renderer/extensions/chrome_v8_context.h
index 11a4a87bec87d9c990898974345e32d13542e02c..3faf9d2a3d642120fbc83c648440d4ed871bf366 100644
--- a/chrome/renderer/extensions/chrome_v8_context.h
+++ b/chrome/renderer/extensions/chrome_v8_context.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "chrome/renderer/module_system.h"
 #include "v8/include/v8.h"
 
 namespace WebKit {
@@ -60,6 +61,10 @@ class ChromeV8Context {
     return context_type_;
   }
 
+  void set_module_system(scoped_ptr<ModuleSystem> module_system) {
+    module_system_ = module_system.Pass();
+  }
+
   // Returns a special Chrome-specific hidden object that is associated with a
   // context, but not reachable from the JavaScript in that context. This is
   // used by our v8::Extension implementations as a way to share code and as a
@@ -113,6 +118,9 @@ class ChromeV8Context {
   // The type of context.
   ContextType context_type_;
 
+  // Owns and structures the JS that is injected to set up extension bindings.
+  scoped_ptr<ModuleSystem> module_system_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeV8Context);
 };