Reviewed by Maciej Stachowiak.

        Rename policyBaseURL and mainDocumentURL to firstPartyForCookies.  The
        previous names were confusing and inaccurate.

        * WebCore.order:
        * dom/Document.cpp:
        (WebCore::Document::setCookie):
        * dom/Document.h:
        (WebCore::Document::firstPartyForCookies):
        (WebCore::Document::setFirstPartyForCookies):
        * loader/FrameLoader.cpp:
        (WebCore::FrameLoader::begin):
        (WebCore::FrameLoader::updateFirstPartyForCookies):
        (WebCore::FrameLoader::setFirstPartyForCookies):
        (WebCore::FrameLoader::open):
        (WebCore::FrameLoader::addExtraFieldsToRequest):
        (WebCore::FrameLoader::loadResourceSynchronously):
        * loader/FrameLoader.h:
        * loader/MainResourceLoader.cpp:
        (WebCore::MainResourceLoader::willSendRequest):
        * platform/CookieJar.h:
        * platform/mac/CookieJar.mm:
        (WebCore::setCookies):
        * platform/network/ResourceRequestBase.cpp:
        (WebCore::ResourceRequestBase::adopt):
        (WebCore::ResourceRequestBase::copyData):
        (WebCore::ResourceRequestBase::firstPartyForCookies):
        (WebCore::ResourceRequestBase::setFirstPartyForCookies):
        (WebCore::equalIgnoringHeaderFields):
        * platform/network/ResourceRequestBase.h:
        * platform/network/cf/ResourceRequestCFNet.cpp:
        (WebCore::ResourceRequest::doUpdatePlatformRequest):
        (WebCore::ResourceRequest::doUpdateResourceRequest):
        * platform/network/chromium/CookieJarChromium.cpp:
        (WebCore::setCookies):
        * platform/network/mac/ResourceRequestMac.mm:
        (WebCore::ResourceRequest::doUpdateResourceRequest):
        (WebCore::ResourceRequest::doUpdatePlatformRequest):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@44047 268f45cc-cd09-0410-ab3c-d52691b4dbfc