Reviewed by Dan Bernstein.

        Implement "Use Selection for Find" in WebKit2
        https://bugs.webkit.org/show_bug.cgi?id=50737
        <rdar://problem/8564881>

        Implement a TakeFindStringFromSelection editor command. This is
        used solely to implement the "Use Selection for Find" menu command
        on Mac, and is not made available to script. On WebKit2, it is
        very convenient to reuse the editing machinery since this command
        is very similar to Copy.

        * editing/Editor.h:
        * editing/EditorCommand.cpp:
        (WebCore::executeTakeFindStringFromSelection): Call to a mac-only Editor function.
        (WebCore::enabledTakeFindStringFromSelection): Check using Editor::canCopyExcludingStandaloneImage
        (WebCore::createCommandMap): Add "TakeFindStringFromSelection" command.
        * editing/mac/EditorMac.mm:
        (WebCore::Editor::canCopyExcludingStandaloneImages): Helper function; we can't use Editor::canCopy
        since it would make no sense to enable "Use Selection for Find" when viewing a standalone image
        document.
        (WebCore::Editor::takeFindStringFromSelection): Implement by copying the selected text
        to the special Find pasteboard.
2010-12-09  Maciej Stachowiak  <mjs@apple.com>

        Reviewed by Dan Bernstein.

        Implement "Use Selection for Find" in WebKit2
        https://bugs.webkit.org/show_bug.cgi?id=50737
        <rdar://problem/8564881>
        
        * UIProcess/API/mac/WKView.mm: Add support for the takeFindStringFromSelection:
        selector as a command.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@73621 268f45cc-cd09-0410-ab3c-d52691b4dbfc