Add an Error class for ServiceWorkers

public/platform/WebServiceWorkerError.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
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  * modification, are permitted provided that the following conditions are
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  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
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  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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-#ifndef WebDOMProgressEvent_h
-#define WebDOMProgressEvent_h
+#ifndef WebServiceWorkerError_h
+#define WebServiceWorkerError_h
 
-#include "WebDOMEvent.h"
+#include "WebString.h"
 
 namespace WebKit {
 
-class WebString;
-
-class WebDOMProgressEvent : public WebDOMEvent {
+class WebServiceWorkerError {
 public:
-    WebDOMProgressEvent() { }
-    BLINK_EXPORT WebDOMProgressEvent(const WebString& type, bool lengthIsComputable, unsigned long long loaded, unsigned long long total);
+    enum ErrorType {
+        RegistrationError = 0,
+    };
+    virtual ~WebServiceWorkerError() { };
+    ErrorType errorType() { return RegistrationError; }
+    virtual const WebString message() { return WebString(); }

[kinuko, 2013/10/15 23:44:44]

Do we want to have implementation of this interface in the embedder?  I'm
feeling that this could just provide real implementation and ctor like
WebServiceWorkerError(ErrorType error, const WebString& message).  Then chromium
side can just use the exported ctor & methods.  Some error code (like
WebSocketStreamError, WebGeolocationError (in public/web)) follows this pattern.

 };
 
 } // namespace WebKit
 
 #endif