Called when a navigation fails or is canceled. This function may be called
by itself if before commit or in combination with OnLoadStart/OnLoadEnd if
after commit. |errorCode| is the error code number, |errorText| is the
error text and |failedUrl| is the URL that failed to load. See
net\base\net_error_list.h for complete descriptions of the error codes.
Called when a navigation fails or is canceled. This function may be called by itself if before commit or in combination with OnLoadStart/OnLoadEnd if after commit. |errorCode| is the error code number, |errorText| is the error text and |failedUrl| is the URL that failed to load. See net\base\net_error_list.h for complete descriptions of the error codes.