Remove the prototype from all V8 functions that aren't constructors

extensions/renderer/module_system.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/module_system.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 649 matching lines @@
   v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(func_as_value);
 
   v8::Local<v8::Object> define_object = v8::Object::New(GetIsolate());
   gin::ModuleRegistry::InstallGlobals(GetIsolate(), define_object);
 
   v8::Local<v8::Object> exports = v8::Object::New(GetIsolate());
 
   v8::Local<v8::FunctionTemplate> tmpl = v8::FunctionTemplate::New(
       GetIsolate(),
       &SetExportsProperty);
+  tmpl->RemovePrototype();
   v8::Local<v8::String> v8_key;
   if (!v8_helpers::ToV8String(GetIsolate(), "$set", &v8_key)) {
     NOTREACHED();
     return v8::Undefined(GetIsolate());
   }
 
   v8::Local<v8::Function> function;
   if (!tmpl->GetFunction(v8_context).ToLocal(&function)) {
     NOTREACHED();
     return v8::Undefined(GetIsolate());
@@ skipping 76 matching lines @@
 
 void ModuleSystem::ClobberExistingNativeHandler(const std::string& name) {
   NativeHandlerMap::iterator existing_handler = native_handler_map_.find(name);
   if (existing_handler != native_handler_map_.end()) {
     clobbered_native_handlers_.push_back(std::move(existing_handler->second));
     native_handler_map_.erase(existing_handler);
   }
 }
 
 }  // namespace extensions