Add a flag for when a navigation is ignored (e.g. by shouldOverrideUrl).

Source/platform/exported/WebURLError.cpp

Index: Source/platform/exported/WebURLError.cpp
diff --git a/Source/platform/exported/WebURLError.cpp b/Source/platform/exported/WebURLError.cpp
index 071984d6fa360cd2168e319a2c3976a17da9d2b5..2030eb74977569e2ebf5d4d49247d1513b3cf26e 100644
--- a/Source/platform/exported/WebURLError.cpp
+++ b/Source/platform/exported/WebURLError.cpp
@@ -53,6 +53,7 @@ WebURLError& WebURLError::operator=(const ResourceError& error)
         isCancellation = error.isCancellation();
         staleCopyInCache = error.staleCopyInCache();
         localizedDescription = error.localizedDescription();
+        wasIgnoredByHandler = error.wasIgnoredByHandler();
     }
     return *this;
 }
@@ -65,6 +66,7 @@ WebURLError::operator ResourceError() const
     ResourceError resourceError = ResourceError(domain, reason, String::fromUTF8(spec.data(), spec.length()), localizedDescription);
     resourceError.setIsCancellation(isCancellation);
     resourceError.setStaleCopyInCache(staleCopyInCache);
+    resourceError.setWasIgnoredByHandler(wasIgnoredByHandler);
     return resourceError;
 }