[EFL][WK2] Use C API inside ewk_url_response
https://bugs.webkit.org/show_bug.cgi?id=107826

Reviewed by Andreas Kling.

* Shared/API/c/WKURLResponse.cpp:
(WKURLResponseGetExpectedContentsLength):
* Shared/API/c/WKURLResponse.h:

    Add new WK2 C API to get the expected contents length.

* UIProcess/API/efl/ewk_url_response.cpp:
(EwkUrlResponse::EwkUrlResponse):
(EwkUrlResponse::httpStatusCode):
(EwkUrlResponse::contentLength):
* UIProcess/API/efl/ewk_url_response_private.h:
(EwkUrlResponse::create):
(EwkUrlResponse):

    Change the methods to not call WebCore methods.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140962 268f45cc-cd09-0410-ab3c-d52691b4dbfc