[EFL][WK2] Ewk_View should report load errors

[EFL][WK2] Ewk_View should report load errors
https://bugs.webkit.org/show_bug.cgi?id=90479

Patch by Christophe Dumez <christophe.dumez@intel.com> on 2012-07-04
Reviewed by Kenneth Rohde Christiansen.

The Ewk_View now emits a "load,error" signal when the
main frame fails loading. Information about the error
is provided via the new Ewk_Web_Error type.

* PlatformEfl.cmake:
* UIProcess/API/efl/EWebKit2.h:
* UIProcess/API/efl/ewk_view.cpp:
(ewk_view_load_error):
* UIProcess/API/efl/ewk_view.h:
* UIProcess/API/efl/ewk_view_loader_client.cpp:
(didFailLoadWithErrorForFrame):
(ewk_view_loader_client_attach):
* UIProcess/API/efl/ewk_view_private.h:
* UIProcess/API/efl/ewk_web_error.cpp: Added.
(_Ewk_Web_Error):
(ewk_web_error_free):
(ewk_web_error_domain_get):
(ewk_web_error_url_get):
(ewk_web_error_code_get):
(ewk_web_error_description_get):
(ewk_web_error_cancellation_get):
(ewk_web_error_new):
* UIProcess/API/efl/ewk_web_error.h: Added.
* UIProcess/API/efl/ewk_web_error_private.h: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121835 268f45cc-cd09-0410-ab3c-d52691b4dbfc