Reviewed by Mitz.

        Add IconFetcher implementation.

        * WebCore.base.exp:
        * WebCore.xcodeproj/project.pbxproj:
        * html/HTMLLinkElement.h:
        (WebCore::HTMLLinkElement::isIcon):
        * loader/icon/IconFetcher.cpp: Added.
        (WebCore::IconLinkEntry::):
        (WebCore::IconLinkEntry::IconLinkEntry):
        (WebCore::IconLinkEntry::type):
        (WebCore::IconLinkEntry::url):
        (WebCore::IconLinkEntry::buffer):
        (WebCore::parseIconLink):
        (WebCore::IconFetcher::create):
        (WebCore::IconFetcher::IconFetcher):
        (WebCore::IconFetcher::~IconFetcher):
        (WebCore::IconFetcher::cancel):
        (WebCore::IconFetcher::createIcon):
        (WebCore::IconFetcher::loadEntry):
        (WebCore::IconFetcher::loadFailed):
        (WebCore::IconFetcher::didReceiveResponse):
        (WebCore::IconFetcher::didReceiveData):
        (WebCore::IconFetcher::didFinishLoading):
        (WebCore::IconFetcher::didFail):
        * loader/icon/IconFetcher.h: Added.
        (WebCore::IconFetcherClient::~IconFetcherClient):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@33978 268f45cc-cd09-0410-ab3c-d52691b4dbfc