- more loader refactoring to simplify things and remove knowledge of WebView from WebSubresourceLoader

        * WebCoreSupport/WebSubresourceLoader.m:
        (+[WebSubresourceLoader startLoadingResource:withRequest:customHeaders:referrer:forDataSource:]):
        (-[WebSubresourceLoader didReceiveResponse:]):
        * WebView/WebDataSource.m:
        (-[WebDataSource _loadIcon]):
        (-[WebDataSource _startLoading]):
        * WebView/WebFrame.m:
        (-[WebFrame _loadRequest:archive:]):
        (-[WebFrame _loadItem:withLoadType:]):
        (-[WebFrame _loadURL:referrer:loadType:target:triggeringEvent:form:formValues:]):
        (-[WebFrame _postWithURL:referrer:target:data:contentType:triggeringEvent:form:formValues:]):
        (-[WebFrame _addExtraFieldsToRequest:mainResource:alwaysFromRequest:]):
        * WebView/WebFrameInternal.h:
        * WebView/WebFramePrivate.h:
        * WebView/WebLoader.h:
        * WebView/WebLoader.m:
        * WebView/WebMainResourceLoader.m:
        (-[WebMainResourceLoader initWithDataSource:]):
        (-[WebMainResourceLoader didReceiveResponse:]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14553 268f45cc-cd09-0410-ab3c-d52691b4dbfc