Reviewed by Darin.

    Reviewed by Darin.

        - remove all non-Loader dependencies from WebLoader

        As part of this I moved WebDataProtocol to the loader directory
        and removed dependencies on the rest of WebKit from that too.

        * Loader/WebFrameLoader.h:
        * Loader/WebFrameLoader.m:
        (-[WebFrameLoader setDefersCallbacks:]):
        (-[WebFrameLoader stopLoading]):
        (-[WebFrameLoader cancelledErrorWithRequest:]):
        (-[WebFrameLoader clearArchivedResources]):
        (-[WebFrameLoader deliverArchivedResources]):
        (-[WebFrameLoader deliverArchivedResourcesAfterDelay]):
        (isCaseSensitiveEqual):
        (-[WebFrameLoader _canUseResourceForRequest:]):
        (-[WebFrameLoader _canUseResourceWithResponse:]):
        (-[WebFrameLoader pendingArchivedResources]):
        (-[WebFrameLoader willUseArchiveForRequest:originalURL:loader:]):
        (-[WebFrameLoader archiveLoadPendingForLoader:]):
        (-[WebFrameLoader cancelPendingArchiveLoadForLoader:]):
        * Loader/WebLoader.h:
        * Loader/WebLoader.m:
        (-[NSURLProtocol releaseResources]):
        (-[NSURLProtocol loadWithRequest:]):
        (-[NSURLProtocol setDefersCallbacks:]):
        (-[NSURLProtocol addData:allAtOnce:]):
        (-[NSURLProtocol resourceData]):
        (-[NSURLProtocol didReceiveData:lengthReceived:allAtOnce:]):
        (-[NSURLProtocol connection:didReceiveData:lengthReceived:]):
        (-[NSURLProtocol cancelWithError:]):
        (-[NSURLProtocol cancelledError]):
        * Loader/WebMainResourceLoader.m:
        (-[WebMainResourceLoader addData:allAtOnce:]):
        (-[WebMainResourceLoader didReceiveData:lengthReceived:allAtOnce:]):
        * Loader/WebNetscapePlugInStreamLoader.m:
        (-[WebNetscapePlugInStreamLoader didReceiveData:lengthReceived:allAtOnce:]):
        * Loader/WebSubresourceLoader.m:
        (-[WebSubresourceLoader didReceiveData:lengthReceived:allAtOnce:]):
        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebDataProtocol.h: Removed.
        * WebView/WebDataProtocol.m: Removed.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@15847 268f45cc-cd09-0410-ab3c-d52691b4dbfc