Implement Asynchronous Module Definition API for Mojo

gin/arguments.h

 // 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.
 
 #ifndef GIN_ARGUMENTS_H_
 #define GIN_ARGUMENTS_H_
 
 #include "base/basictypes.h"
 #include "gin/converter.h"
 
@@ skipping 17 matching lines @@
     }
     v8::Handle<v8::Value> val = info_[next_++];
     return ConvertFromV8(val, out);
   }
 
   template<typename T>
   void Return(T val) {
     info_.GetReturnValue().Set(ConvertToV8(isolate_, val));
   }
 
+  v8::Handle<v8::Value> PeekNext();
+
   void ThrowError();
   void ThrowTypeError(const std::string& message);
 
   v8::Isolate* isolate() const { return isolate_; }
 
  private:
   v8::Isolate* isolate_;
   const v8::FunctionCallbackInfo<v8::Value>& info_;
   int next_;
   bool insufficient_arguments_;
 
   DISALLOW_COPY_AND_ASSIGN(Arguments);
 };
 
 }  // namespace gin
 
 #endif  // GIN_ARGUMENTS_H_