Implement a module system for the extension bindings JS.

chrome/renderer/extensions/custom_bindings_util.h

Index: chrome/renderer/extensions/custom_bindings_util.h
diff --git a/chrome/renderer/extensions/custom_bindings_util.h b/chrome/renderer/extensions/custom_bindings_util.h
index 8746321305ddf09691ede6f7024f48f79015fb39..c5d6eba79a0ff70affdf3297deac184593d52eb1 100644
--- a/chrome/renderer/extensions/custom_bindings_util.h
+++ b/chrome/renderer/extensions/custom_bindings_util.h
@@ -25,9 +25,6 @@ namespace extensions {
 // bindings.
 namespace custom_bindings_util {
 
-// Creates V8 extensions for all custom bindings.
-std::vector<v8::Extension*> GetAll(ExtensionDispatcher* extension_dispatcher);
-
 // Extracts the name of an API from the name of the V8 extension which contains
 // custom bindings for it.
 // Returns an empty string if the extension is not for a custom binding.