remove use of context scope with persistent argument

samples/lineprocessor.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 112 matching lines @@
   // but we shouldn't worry about this.
   //
   // All we have to do is to set context and call ProcessDebugMessages.
   //
   // We should decide which V8 context to use here. This is important for
   // "evaluate" command, because it must be executed some context.
   // In our sample we have only one context, so there is nothing really to
   // think about.
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   v8::HandleScope handle_scope(isolate);
-  v8::Context::Scope scope(isolate, debug_message_context);
+  v8::Local<v8::Context> context =
+      v8::Local<v8::Context>::New(isolate, debug_message_context);
+  v8::Context::Scope scope(context);
 
   v8::Debug::ProcessDebugMessages();
 }
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 int RunMain(int argc, char* argv[]) {
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   v8::HandleScope handle_scope(isolate);
@@ skipping 297 matching lines @@
   }
   // Remove newline char
   for (char* pos = buffer; *pos != '\0'; pos++) {
     if (*pos == '\n') {
       *pos = '\0';
       break;
     }
   }
   return v8::String::New(buffer);
 }