remove use of context scope with persistent argument

samples/process.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 150 matching lines @@
   // Create a template for the global object where we set the
   // built-in global functions.
   Handle<ObjectTemplate> global = ObjectTemplate::New();
   global->Set(String::New("log"), FunctionTemplate::New(LogCallback));
 
   // Each processor gets its own context so different processors don't
   // affect each other. Context::New returns a persistent handle which
   // is what we need for the reference to remain after we return from
   // this method. That persistent handle has to be disposed in the
   // destructor.
-  context_.Reset(GetIsolate(), Context::New(GetIsolate(), NULL, global));
+  v8::Handle<v8::Context> context = Context::New(GetIsolate(), NULL, global);
+  context_.Reset(GetIsolate(), context);
 
   // Enter the new context so all the following operations take place
   // within it.
-  Context::Scope context_scope(GetIsolate(), context_);
+  Context::Scope context_scope(context);
 
   // Make the options mapping available within the context
   if (!InstallMaps(opts, output))
     return false;
 
   // Compile and run the script
   if (!ExecuteScript(script_))
     return false;
 
   // The script compiled and ran correctly.  Now we fetch out the
@@ skipping 60 matching lines @@
   context_->Global()->Set(String::New("output"), output_obj);
 
   return true;
 }
 
 
 bool JsHttpRequestProcessor::Process(HttpRequest* request) {
   // Create a handle scope to keep the temporary object references.
   HandleScope handle_scope(GetIsolate());
 
+  v8::Local<v8::Context> context =
+      v8::Local<v8::Context>::New(GetIsolate(), context_);
+
   // Enter this processor's context so all the remaining operations
   // take place there
-  Context::Scope context_scope(GetIsolate(), context_);
+  Context::Scope context_scope(context);
 
   // Wrap the C++ request object in a JavaScript wrapper
   Handle<Object> request_obj = WrapRequest(request);
 
   // Set up an exception handler before calling the Process function
   TryCatch try_catch;
 
   // Invoke the process function, giving the global object as 'this'
   // and one argument, the request.
   const int argc = 1;
@@ skipping 360 matching lines @@
   JsHttpRequestProcessor processor(isolate, source);
   map<string, string> output;
   if (!processor.Initialize(&options, &output)) {
     fprintf(stderr, "Error initializing processor.\n");
     return 1;
   }
   if (!ProcessEntries(&processor, kSampleSize, kSampleRequests))
     return 1;
   PrintMap(&output);
 }