Add toWebCoreString() / toWebCoreAtomicString() overloads taking a v8::String

Source/bindings/v8/custom/V8WorkerGlobalScopeCustom.cpp

 /*
  * Copyright (C) 2009 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 52 matching lines @@
 
     OwnPtr<ScheduledAction> action;
     v8::Handle<v8::Context> v8Context = script->context();
     if (function->IsString()) {
         if (ContentSecurityPolicy* policy = workerGlobalScope->contentSecurityPolicy()) {
             if (!policy->allowEval()) {
                 v8SetReturnValue(args, 0);
                 return;
             }
         }
-        action = adoptPtr(new ScheduledAction(v8Context, toWebCoreString(function), workerGlobalScope->url(), args.GetIsolate()));
+        action = adoptPtr(new ScheduledAction(v8Context, toWebCoreString(function.As<v8::String>()), workerGlobalScope->url(), args.GetIsolate()));
     } else if (function->IsFunction()) {
         size_t paramCount = argumentCount >= 2 ? argumentCount - 2 : 0;
         OwnArrayPtr<v8::Local<v8::Value> > params;
         if (paramCount > 0) {
             params = adoptArrayPtr(new v8::Local<v8::Value>[paramCount]);
             for (size_t i = 0; i < paramCount; ++i)
                 params[i] = args[i+2];
         }
         // ScheduledAction takes ownership of actual params and releases them in its destructor.
         action = adoptPtr(new ScheduledAction(v8Context, v8::Handle<v8::Function>::Cast(function), paramCount, params.get(), args.GetIsolate()));
@@ skipping 30 matching lines @@
     WorkerScriptController* script = impl->script();
     if (!script)
         return v8NullWithCheck(isolate);
 
     v8::Handle<v8::Object> global = script->context()->Global();
     ASSERT(!global.IsEmpty());
     return global;
 }
 
 } // namespace WebCore