Merge DevTools Refactor CL to Blink36

Source/core/inspector/WorkerDebuggerAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. 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
@@ skipping 99 matching lines @@
 void WorkerDebuggerAgent::stopListeningScriptDebugServer()
 {
     scriptDebugServer().removeListener(this);
 }
 
 WorkerScriptDebugServer& WorkerDebuggerAgent::scriptDebugServer()
 {
     return *m_scriptDebugServer;
 }
 
-InjectedScript WorkerDebuggerAgent::injectedScriptForEval(ErrorString* error, const int* executionContextId)
+InjectedScript& WorkerDebuggerAgent::injectedScriptForEval(ErrorString* error, const int* executionContextId)
 {
     if (executionContextId) {
         *error = "Execution context id is not supported for workers as there is only one execution context.";
-        return InjectedScript();
+        return injectedScriptManager()->placeholderInjectedScript();
     }
     return injectedScriptManager()->injectedScriptFor(m_inspectedWorkerGlobalScope->script()->scriptState());
 }
 
 void WorkerDebuggerAgent::muteConsole()
 {
     // We don't need to mute console for workers.
 }
 
 void WorkerDebuggerAgent::unmuteConsole()
 {
     // We don't need to mute console for workers.
 }
 
 } // namespace WebCore