Revert "Create errors (especially cancellation errors) internally to WebCore, rather"

Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 219 matching lines @@
     virtual void dispatchDidFinishDocumentLoad() { }
     virtual void dispatchDidFinishLoad() { }
     virtual void dispatchDidLayout(LayoutMilestones) { }
 
     virtual Frame* dispatchCreatePage(const NavigationAction&) { return 0; }
     virtual void dispatchShow() { }
 
     virtual PolicyAction policyForNewWindowAction(const NavigationAction&, const String&) OVERRIDE;
     virtual PolicyAction decidePolicyForNavigationAction(const NavigationAction&, const ResourceRequest&) OVERRIDE;
 
+    virtual void dispatchUnableToImplementPolicy(const ResourceError&) { }
+
     virtual void dispatchWillSendSubmitEvent(PassRefPtr<FormState>) OVERRIDE;
     virtual void dispatchWillSubmitForm(PassRefPtr<FormState>) OVERRIDE;
 
     virtual void setMainDocumentError(DocumentLoader*, const ResourceError&) { }
 
     virtual void postProgressStartedNotification() { }
     virtual void postProgressEstimateChangedNotification() { }
     virtual void postProgressFinishedNotification() { }
 
     virtual void startDownload(const ResourceRequest&, const String& suggestedName = String()) { UNUSED_PARAM(suggestedName); }
 
     virtual void committedLoad(DocumentLoader*, const char*, int) { }
     virtual void finishedLoading(DocumentLoader*) { }
+
+    virtual ResourceError cancelledError(const ResourceRequest&) { ResourceError error("", 0, "", ""); error.setIsCancellation(true); return error; }
+    virtual ResourceError cannotShowURLError(const ResourceRequest&) { return ResourceError("", 0, "", ""); }
     virtual ResourceError interruptedForPolicyChangeError(const ResourceRequest&) { return ResourceError("", 0, "", ""); }
 
+    virtual ResourceError cannotShowMIMETypeError(const ResourceResponse&) { return ResourceError("", 0, "", ""); }
+    virtual ResourceError fileDoesNotExistError(const ResourceResponse&) { return ResourceError("", 0, "", ""); }
+    virtual ResourceError pluginWillHandleLoadError(const ResourceResponse&) { return ResourceError("", 0, "", ""); }
+
+    virtual bool shouldFallBack(const ResourceError&) { return false; }
+
+    virtual bool canHandleRequest(const ResourceRequest&) const { return false; }
     virtual bool canShowMIMEType(const String&) const { return false; }
     virtual String generatedMIMETypeForURLScheme(const String&) const { return ""; }
 
     virtual bool shouldTreatURLAsSameAsCurrent(const KURL&) const { return false; }
     virtual void didFinishLoad() { }
 
     virtual PassRefPtr<DocumentLoader> createDocumentLoader(const ResourceRequest&, const SubstituteData&) OVERRIDE;
 
     virtual String userAgent(const KURL&) { return ""; }
 
@@ skipping 207 matching lines @@
     virtual int forwardListCount() { return 0; }
     virtual bool isActive() { return false; }
     virtual void close() { }
 };
 
 void fillWithEmptyClients(Page::PageClients&);
 
 }
 
 #endif // EmptyClients_h