- clean up ResourceRequest to be closer to a proper request interface

        * page/ResourceRequest.h: folded URL into ResourceRequest, other cleanup
        (WebCore::ResourceRequest::ResourceRequest): Add new explicit constructor
        that takes a KURL.
        (WebCore::ResourceRequest::url): getter for KURL
        (WebCore::ResourceRequest::setURL): corresponding setter
        (WebCore::ResourceRequest::referrer): new getter for referrer, instead
        of storing it in m_metaData (it was the only remaining real use of it)
        (WebCore::ResourceRequest::setReferrer): corresponding setter
        * bridge/BrowserExtension.h: 
        - removed unused openURLRequest and openURLNotify methods
        - folded KURL parameter into ResourceRequest
        * bridge/mac/BrowserExtensionMac.h: remove KURL args from methods that
        also take a ResourceRequest
        * bridge/mac/BrowserExtensionMac.mm:
        (WebCore::BrowserExtensionMac::createNewWindow): adjust for ResourceRequest
        changes.
        * bridge/mac/MacFrame.h: remove KURL args from methods that also take a
        ResourceRequest
        * bridge/mac/MacFrame.mm:
        (WebCore::MacFrame::openURLRequest): adjust for ResourceRequest changes
        (WebCore::MacFrame::submitForm): ditto
        (WebCore::MacFrame::urlSelected): ditto
        * bridge/mac/WebCoreFrameBridge.mm:
        (-[WebCoreFrameBridge openURL:reload:contentType:refresh:lastModified:pageCache:]): 
        adjust for ResourceRequest changes
        * bridge/win/BrowserExtensionWin.h:
        * khtml/ecma/kjs_window.cpp:
        (KJS::createNewWindow): adjust for ResourceRequest changes
        (KJS::WindowFunc::callAsFunction): ditto
        * page/Frame.cpp:
        (WebCore::Frame::didOpenURL): adjust for ResourceRequest changes
        (WebCore::Frame::receivedFirstData): ditto
        (WebCore::Frame::begin): ditto
        (WebCore::Frame::completeURL): ditto
        (WebCore::Frame::changeLocation): ditto
        (WebCore::Frame::urlSelected): ditto
        (WebCore::Frame::requestFrame): ditto
        (WebCore::Frame::submitForm): ditto
        * page/Frame.h:
        * platform/win/TemporaryLinkStubs.cpp:
        (BrowserExtensionWin::createNewWindow): ditto



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@13364 268f45cc-cd09-0410-ab3c-d52691b4dbfc