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        Reviewed by Sam Weinig.

        Dragging image to desktop gives webloc instead of image file in WebKit2
        https://bugs.webkit.org/show_bug.cgi?id=56193

        * WebCore.exp.in: Added some additional exports. Re-sorted.
2011-03-11  Darin Adler  <darin@apple.com>

        Reviewed by Sam Weinig.

        Dragging image to desktop gives webloc instead of image file in WebKit2
        https://bugs.webkit.org/show_bug.cgi?id=56193

        * WebProcess/WebCoreSupport/mac/WebDragClientMac.mm:
        (WebKit::convertImageToBitmap): Added. Factored out from startDrag to
        make the startDrag code clearer.
        (WebKit::WebDragClient::startDrag): Streamlined code a bit.
        (WebKit::cachedImage): Added. Helper for function below.
        (WebKit::arrayForURLsWithTitles): Added. Helper for function below.
        (WebKit::WebDragClient::declareAndWriteDragImage): Added code to handle file
        promises and removed a log of uneeded code.
        (-[WKPasteboardFilePromiseOwner copyDropDirectory]): Added.
        (promisedDataClient): Added.
        (-[WKPasteboardOwner clearImage]): Added.
        (-[WKPasteboardOwner initWithImage:]): Added.
        (-[WKPasteboardOwner dealloc]): Added.
        (-[WKPasteboardOwner finalize]): Added.
        (-[WKPasteboardOwner pasteboard:provideDataForType:]): Added.
        (-[WKPasteboardOwner pasteboardChangedOwner:]): Added.
        (matchesExtensionOrEquivalent): Added.
        (-[WKPasteboardOwner namesOfPromisedFilesDroppedAtDestination:]): Added.
        Much of the new code above came from the WebKit1 drag code.

        * WebProcess/WebPage/WebPage.cpp:
        (WebKit::WebPage::dragEnded): Added call to Mac-only platformDragEnded.
        * WebProcess/WebPage/WebPage.h: Added Mac-only platformDragEnded and m_dragSource.
        * WebProcess/WebPage/mac/WebPageMac.mm:
        (WebKit::WebPage::setDragSource): Added.
        (WebKit::WebPage::platformDragEnded): Added.


git-svn-id: svn://svn.chromium.org/blink/trunk@80948 bbb929c8-8fbe-4397-9dbb-9b2b20218538