[WK2][EFL] creating dummy class derived from ResourceHandleClient for Efl download...

[WK2][EFL] creating dummy class derived from ResourceHandleClient for Efl download module.
https://bugs.webkit.org/show_bug.cgi?id=76171

Patch by Keunsoon Lee <keunsoon.lee@samsung.com> on 2012-02-08
Reviewed by Andreas Kling.

FileDownloaderEfl is a practical class to operate file download.
It communicates with Download class to start download
and to notify downloading states to user(e.g. client application).
Besides FileDownloaderEfl derives from ResourceHandleClient
and receives chunked data from ResourceHandle directly
or redirects data flow which is started from MainResourceLoader
by mean of exchanging ResourceHandle's existing client for FileDownloaderEfl.

This patch has only dummy functions to make easy to review.
Working patch will be uploaded on another bug thread.

* PlatformEfl.cmake: added new file to compile.
* WebProcess/Downloads/Download.h: added FileDownloaderEfl's instance as a form of OwnPtr<FileDownloaderEfl>.
(WebKit):
(Download):
* WebProcess/Downloads/efl/DownloadEfl.cpp:
(WebKit::Download::start): calling to FileDownloaderEfl::start() to start download for passing ResourceRequest.
* WebProcess/Downloads/efl/FileDownloaderEfl.cpp: Added. a practical class to operate file download.
(WebKit):
(WebKit::FileDownloaderEfl::create): create function, which returns PassOwnPtr<FileDownloaderEfl>.
(WebKit::FileDownloaderEfl::FileDownloaderEfl): constructor, which receives Download* as a parameter.
(WebKit::FileDownloaderEfl::~FileDownloaderEfl): deconstructor.
(WebKit::FileDownloaderEfl::start): a function to start downloading for passed ResourceRequest.
It does nothing for now, but shows how Download class can call FileDownloaderEfl's function.
(WebKit::FileDownloaderEfl::didReceiveResponse): virtual function for ResourceHandleClient.
It will receive response header information from ResourceHandle.
(WebKit::FileDownloaderEfl::didReceiveData): virtual function for ResourceHandleClient.
It will receive chunk data from ResourceHandle.
(WebKit::FileDownloaderEfl::didFinishLoading): virtual function for ResourceHandleClient.
It will be notified loading is finished from ResourceHandle.
(WebKit::FileDownloaderEfl::didFail): virtual function for ResourceHandleClient.
It will be notified loading is fail with ResourceError from ResourceHandle.
(WebKit::FileDownloaderEfl::shouldUseCredentialStorage): virtual function for ResourceHandleClient.
It returns whether to use credential storage or not.
(WebKit::FileDownloaderEfl::didReceiveAuthenticationChallenge): virtual function for ResourceHandleClient.
It will receive AuthenticationChallenge.
(WebKit::FileDownloaderEfl::didCancelAuthenticationChallenge): virtual function for ResourceHandleClient.
It will be notified AuthenticationChallenge is canceled.
(WebKit::FileDownloaderEfl::receivedCancellation): virtual function for ResourceHandleClient.
* WebProcess/Downloads/efl/FileDownloaderEfl.h: Added.
(WebCore):
(WebKit):
(FileDownloaderEfl):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@107180 268f45cc-cd09-0410-ab3c-d52691b4dbfc