Creates a JavaScript Applicaiton

gin/modules/module_registry.cc

 // Copyright 2013 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 "gin/modules/module_registry.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 150 matching lines @@
 
 void ModuleRegistry::LoadModule(Isolate* isolate,
                                 const std::string& id,
                                 LoadModuleCallback callback) {
   if (available_modules_.find(id) != available_modules_.end()) {
     // Should we call the callback asynchronously?
     callback.Run(GetModule(isolate, id));
     return;
   }
   waiting_callbacks_.insert(std::make_pair(id, callback));
+
+  for (size_t i = 0; i < pending_modules_.size(); ++i) {
+    if (pending_modules_[i]->id == id)
+      return;
+  }
+
   unsatisfied_dependencies_.insert(id);
 }
 
 void ModuleRegistry::RegisterModule(Isolate* isolate,
                                     const std::string& id,
                                     v8::Handle<Value> module) {
   if (id.empty() || module.IsEmpty())
     return;
 
   unsatisfied_dependencies_.erase(id);
@@ skipping 83 matching lines @@
     for (size_t i = 0; i < pending_modules.size(); ++i) {
       scoped_ptr<PendingModule> pending(pending_modules[i]);
       pending_modules[i] = NULL;
       if (AttemptToLoad(isolate, pending.Pass()))
         keep_trying = true;
     }
   }
 }
 
 }  // namespace gin