Add a simple one shot and repeating timer API for Mojo.js.

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 "base/logging.h"
 #include "gin/converter.h"
 #include "gin/gin_export.h"
 
 namespace gin {
 
 // Arguments is a wrapper around v8::FunctionCallbackInfo that integrates
 // with Converter to make it easier to marshall arguments and return values
 // between V8 and C++.
 class GIN_EXPORT Arguments {
  public:
@@ skipping 32 matching lines @@
     for (int i = 0; i < remaining; ++i) {
       v8::Handle<v8::Value> val = (*info_)[next_++];
       if (!ConvertFromV8(isolate_, val, &out->at(i)))
         return false;
     }
     return true;
   }
 
   template<typename T>
   void Return(T val) {
-    info_->GetReturnValue().Set(ConvertToV8(isolate_, val));
+    v8::Handle<v8::Value> r(ConvertToV8(isolate_, val));
+    LOG(ERROR) << "v8 return value: " << r->Int32Value();
+    info_->GetReturnValue().Set(r);
   }
 
   v8::Handle<v8::Value> PeekNext() const;
 
   void ThrowError() const;
   void ThrowTypeError(const std::string& message) const;
 
   v8::Isolate* isolate() const { return isolate_; }
 
  private:
   v8::Isolate* isolate_;
   const v8::FunctionCallbackInfo<v8::Value>* info_;
   int next_;
   bool insufficient_arguments_;
 };
 
 }  // namespace gin
 
 #endif  // GIN_ARGUMENTS_H_