Beginning of JS Mojo API to GL

gin/arguments.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/arguments.h"
 
 #include "base/strings/stringprintf.h"
 #include "gin/converter.h"
 
 namespace gin {
 
 Arguments::Arguments()
     : isolate_(NULL),
       info_(NULL),
       next_(0),
       insufficient_arguments_(false) {
 }
 
 Arguments::Arguments(const v8::FunctionCallbackInfo<v8::Value>& info)
     : isolate_(info.GetIsolate()),
       info_(&info),
       next_(0),
       insufficient_arguments_(false) {
 }
 
 Arguments::~Arguments() {
 }
 
-v8::Handle<v8::Value> Arguments::PeekNext() {
+v8::Handle<v8::Value> Arguments::PeekNext() const {
   if (next_ >= info_->Length())
     return v8::Handle<v8::Value>();
   return (*info_)[next_];
 }
 
-void Arguments::ThrowError() {
+void Arguments::ThrowError() const {
   if (insufficient_arguments_)
     return ThrowTypeError("Insufficient number of arguments.");
 
   ThrowTypeError(base::StringPrintf(
       "Error processing argument %d.", next_ - 1));
 }
 
-void Arguments::ThrowTypeError(const std::string& message) {
+void Arguments::ThrowTypeError(const std::string& message) const {
   isolate_->ThrowException(v8::Exception::TypeError(
       StringToV8(isolate_, message)));
 }
 
 }  // namespace gin