Revert "deprecate Context::New which returns Persistent"

src/mksnapshot.cc

Index: src/mksnapshot.cc
diff --git a/src/mksnapshot.cc b/src/mksnapshot.cc
index 7592a8953110683c83c8f7e8942a57cd32555df7..b3c6097c859249439185907a9357423f49596c05 100644
--- a/src/mksnapshot.cc
+++ b/src/mksnapshot.cc
@@ -328,18 +328,13 @@ int main(int argc, char** argv) {
   }
 #endif
   i::Serializer::Enable();
-  Isolate* isolate = Isolate::GetCurrent();
-  Persistent<Context> context;
-  {
-    HandleScope handle_scope(isolate);
-    context.Reset(isolate, Context::New(isolate));
-  }
-
+  Persistent<Context> context = v8::Context::New();
   if (context.IsEmpty()) {
     fprintf(stderr,
             "\nException thrown while compiling natives - see above.\n\n");
     exit(1);
   }
+  Isolate* isolate = context->GetIsolate();
   if (i::FLAG_extra_code != NULL) {
     context->Enter();
     // Capture 100 frames if anything happens.