WebCore:

WebCore:

        Reviewed by Anders.

        - added some SPI indirections to support the following in WebKit/Loader:
            - pull more WebDataSource code into WebFrameLoader
            - make WebMainResourceLoader not depend on WebKit or on SPI

        * WebCore.exp:
        * WebCore.xcodeproj/project.pbxproj:
        * platform/mac/WebCoreSystemInterface.h:
        * platform/mac/WebCoreSystemInterface.mm:

WebKit:

        Reviewed by Anders.

        - pull more WebDataSource code into WebFrameLoader
        - make WebMainResourceLoader not depend on WebKit or on SPI

        * Loader/WebFrameLoader.h:
        * Loader/WebFrameLoader.m:
        (-[WebFrameLoader _downloadWithLoadingConnection:request:response:proxy:]):
        (-[WebFrameLoader _updateIconDatabaseWithURL:]):
        (-[WebFrameLoader _notifyIconChanged:]):
        (-[WebFrameLoader _iconLoaderReceivedPageIcon:]):
        (-[WebFrameLoader _checkNavigationPolicyForRequest:andCall:withSelector:]):
        (-[WebFrameLoader _checkContentPolicyForMIMEType:andCall:withSelector:]):
        (-[WebFrameLoader cancelContentPolicy]):
        * Loader/WebIconLoader.m:
        (-[WebIconLoader didFinishLoading]):
        * Loader/WebLoader.m:
        (-[NSURLProtocol loadWithRequest:]):
        (-[NSURLProtocol setDefersCallbacks:]):
        * Loader/WebMainResourceLoader.h:
        * Loader/WebMainResourceLoader.m:
        (-[WebMainResourceLoader initWithFrameLoader:]):
        (-[WebMainResourceLoader dealloc]):
        (-[WebMainResourceLoader cancelWithError:]):
        (-[WebMainResourceLoader continueAfterNavigationPolicy:formState:]):
        (-[WebMainResourceLoader willSendRequest:redirectResponse:]):
        (-[WebMainResourceLoader continueAfterContentPolicy:]):
        (-[WebMainResourceLoader checkContentPolicy]):
        (-[WebMainResourceLoader didReceiveResponse:]):
        * Plugins/WebPluginContainerCheck.m:
        * WebCoreSupport/WebSystemInterface.m:
        (InitWebCoreSystemInterface):
        * WebView/WebDataSource.m:
        (-[WebDataSource _loadIcon]):
        (-[WebDataSource _cancelledError]):
        (+[WebDataSource _repTypesAllowImageTypeOmission:]):
        (+[WebDataSource _representationClassForMIMEType:]):
        (-[WebDataSource _commitLoadWithData:]):
        (-[WebDataSource _isDocumentHTML]):
        * WebView/WebDataSourceInternal.h:
        * WebView/WebFramePrivate.h:
        * WebView/WebPolicyDelegate.m:
        * WebView/WebPolicyDelegatePrivate.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@15976 268f45cc-cd09-0410-ab3c-d52691b4dbfc