remove use of context scope with persistent argument

samples/process.cc

Index: samples/process.cc
diff --git a/samples/process.cc b/samples/process.cc
index fd3a82163904b376dc60a24a08298ff1c7a32a22..8a41faec9b5afc21c867c3630c3723b66c1f0099 100644
--- a/samples/process.cc
+++ b/samples/process.cc
@@ -168,11 +168,12 @@ bool JsHttpRequestProcessor::Initialize(map<string, string>* opts,
   // 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))
@@ -253,9 +254,12 @@ 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);