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

Source/WebKit/chromium/public/WebFrameClient.h

Index: Source/WebKit/chromium/public/WebFrameClient.h
===================================================================
--- Source/WebKit/chromium/public/WebFrameClient.h	(revision 148582)
+++ Source/WebKit/chromium/public/WebFrameClient.h	(working copy)
@@ -141,23 +141,6 @@
         const WebNode& originatingNode,
         WebNavigationPolicy defaultPolicy, bool isRedirect) { return defaultPolicy; }
 
-    // Query if the specified request can be handled.
-    virtual bool canHandleRequest(
-        WebFrame*, const WebURLRequest& request) { return true; }
-
-    // Returns an error corresponding to canHandledRequest() returning false.
-    virtual WebURLError cannotHandleRequestError(
-        WebFrame*, const WebURLRequest& request) { return WebURLError(); }
-
-    // Returns an error corresponding to a user cancellation event.
-    virtual WebURLError cancelledError(
-        WebFrame*, const WebURLRequest& request) { return WebURLError(); }
-
-    // Notify that a URL cannot be handled.
-    virtual void unableToImplementPolicyWithError(
-        WebFrame*, const WebURLError&) { }
-
-
     // Navigational notifications ------------------------------------------
 
     // A form submission has been requested, but the page's submit event handler