Merge DevTools Refactor CL to Blink36

Source/core/inspector/WorkerDebuggerAgent.cpp

Index: Source/core/inspector/WorkerDebuggerAgent.cpp
diff --git a/Source/core/inspector/WorkerDebuggerAgent.cpp b/Source/core/inspector/WorkerDebuggerAgent.cpp
index 52d2b4d4f5c01e4badba956ba1125f152e94843d..46a5ae07f49e3377d1719408f6ed82e7e7af7dea 100644
--- a/Source/core/inspector/WorkerDebuggerAgent.cpp
+++ b/Source/core/inspector/WorkerDebuggerAgent.cpp
@@ -117,11 +117,11 @@ 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());
 }