- start moving loading logic to new WebFrameLoader class; move management of WebLoaders there

        * Misc/WebIconLoader.h:
        * Misc/WebIconLoader.m:
        (-[WebIconLoader didFinishLoading]):
        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebDataSource.m:
        (-[WebDataSourcePrivate dealloc]):
        (-[WebDataSource _updateLoading]):
        (-[WebDataSource _loadIcon]):
        (-[WebDataSource _setPrimaryLoadComplete:]):
        (-[WebDataSource _stopLoading]):
        (-[WebDataSource _startLoading]):
        (-[WebDataSource _addSubresourceLoader:]):
        (-[WebDataSource _removeSubresourceLoader:]):
        (-[WebDataSource _addPlugInStreamLoader:]):
        (-[WebDataSource _removePlugInStreamLoader:]):
        (-[WebDataSource _iconLoaderReceivedPageIcon:]):
        (-[WebDataSource _defersCallbacksChanged]):
        (-[WebDataSource _stopLoadingWithError:]):
        (-[WebDataSource _setupForReplaceByMIMEType:]):
        (-[WebDataSource initWithRequest:]):
        (-[WebDataSource dealloc]):
        (-[WebDataSource finalize]):
        (-[WebDataSource data]):
        (-[WebDataSource isLoading]):
        * WebView/WebFrameLoader.h: Added.
        * WebView/WebFrameLoader.m: Added.
        (-[WebFrameLoader initWithDataSource:]):
        (-[WebFrameLoader dealloc]):
        (-[WebFrameLoader hasIconLoader]):
        (-[WebFrameLoader loadIconWithRequest:]):
        (-[WebFrameLoader stopLoadingIcon]):
        (-[WebFrameLoader addPlugInStreamLoader:]):
        (-[WebFrameLoader removePlugInStreamLoader:]):
        (-[WebFrameLoader setDefersCallbacks:]):
        (-[WebFrameLoader stopLoadingPlugIns]):
        (-[WebFrameLoader isLoadingMainResource]):
        (-[WebFrameLoader isLoadingSubresources]):
        (-[WebFrameLoader isLoading]):
        (-[WebFrameLoader stopLoadingSubresources]):
        (-[WebFrameLoader addSubresourceLoader:]):
        (-[WebFrameLoader removeSubresourceLoader:]):
        (-[WebFrameLoader mainResourceData]):
        (-[WebFrameLoader releaseMainResourceLoader]):
        (-[WebFrameLoader cancelMainResourceLoad]):
        (-[WebFrameLoader startLoadingMainResourceWithRequest:identifier:]):
        (-[WebFrameLoader stopLoadingWithError:]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14976 268f45cc-cd09-0410-ab3c-d52691b4dbfc