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

Source/core/platform/network/ResourceError.cpp

Index: Source/core/platform/network/ResourceError.cpp
diff --git a/Source/core/platform/network/ResourceError.cpp b/Source/core/platform/network/ResourceError.cpp
index 05b5bd58a5d29c3f5049861d8fea066eaa808194..6d5c4ae8c74adf2df7ca7bbe91ab1c58eed64773 100644
--- a/Source/core/platform/network/ResourceError.cpp
+++ b/Source/core/platform/network/ResourceError.cpp
@@ -27,20 +27,10 @@
 #include "config.h"
 #include "core/platform/network/ResourceError.h"
 
-#include "core/platform/KURL.h"
-#include <public/Platform.h>
-#include <public/WebURL.h>
-#include <public/WebURLError.h>
-
 namespace WebCore {
 
 const char* const errorDomainWebKitInternal = "WebKitInternal";
 
-ResourceError ResourceError::cancelledError(const String& failingURL)
-{
-    return WebKit::Platform::current()->cancelledError(KURL(ParsedURLString, failingURL));
-}
-
 ResourceError ResourceError::copy() const
 {
     ResourceError errorCopy;