Reviewed by harrison

        * editing/execCommand/paste-1-expected.checksum: Added.
        * editing/execCommand/paste-1-expected.png: Added.
        * editing/execCommand/paste-1-expected.txt: Added.
        * editing/execCommand/paste-1.html: Added.
        * editing/execCommand/paste-2-expected.checksum: Added.
        * editing/execCommand/paste-2-expected.png: Added.
        * editing/execCommand/paste-2-expected.txt: Added.
        * editing/execCommand/paste-2.html: Added.

WebKit:

        Reviewed by harrison
        
        execCommand("Cut"/"Copy"/"Paste") broken in editable subframes.

        * WebCoreSupport/WebFrameBridge.m:
        (-[WebFrameBridge issueCutCommand]): Issue the command on the WebHTMLView, not the WebView.
        (-[WebFrameBridge issueCopyCommand]): Ditto.
        (-[WebFrameBridge issuePasteCommand]): Ditto.
        (-[WebFrameBridge issuePasteAndMatchStyleCommand]): Ditto.
        (-[WebFrameBridge issueTransposeCommand]): Fixed formatting.
        (-[WebFrameBridge canPaste]): Ask the WebHTMLView, not the WebView.
        * WebView/WebHTMLView.m:
        (-[WebHTMLView copy:]): Moved to WebInternal
        (-[WebHTMLView cut:]): Ditto.
        (-[WebHTMLView paste:]): Ditto.
        (-[WebHTMLView pasteAsPlainText:]): Ditto.
        * WebView/WebHTMLViewInternal.h:
        * WebView/WebView.m: Removed the now unused _canPaste.
        * WebView/WebViewInternal.h: Ditto.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@16752 268f45cc-cd09-0410-ab3c-d52691b4dbfc