Reviewed by Darin.

        Let the editor client handle undo/redo.
        
        * WebCore.exp:
        * WebCore.xcodeproj/project.pbxproj:
        * bridge/EditorClient.h:
        * bridge/mac/FrameMac.h:
        * bridge/mac/FrameMac.mm:
        (WebCore::FrameMac::canUndo):
        (WebCore::FrameMac::canRedo):
        * bridge/mac/WebCoreEditCommand.h: Removed.
        * bridge/mac/WebCoreEditCommand.mm: Removed.
        * bridge/mac/WebCoreFrameBridge.h:
        * bridge/mac/WebCoreFrameBridge.mm:
        * editing/Editor.cpp:
        (WebCore::Editor::appliedEditing):
        (WebCore::Editor::unappliedEditing):
        (WebCore::Editor::reappliedEditing):
        * editing/JSEditor.cpp:
        * loader/FrameLoader.cpp:
        (WebCore::FrameLoader::closeURL):
        * page/Frame.cpp:
        * page/Frame.h:
        * rendering/RenderTextControl.cpp:
        (WebCore::RenderTextControl::updateFromElement):

WebKit:

        Reviewed by Darin.

        Move undo/redo handling into WebEditorClient.
        
        * WebCoreSupport/WebEditorClient.h:
        * WebCoreSupport/WebEditorClient.mm:
        (WebEditorClient::WebEditorClient):
        (WebEditorClient::~WebEditorClient):
        (-[WebEditCommand initWithEditCommand:WebCore::]):
        (-[WebEditCommand dealloc]):
        (-[WebEditCommand finalize]):
        (+[WebEditCommand commandWithEditCommand:]):
        (-[WebEditCommand command]):
        (-[WebEditorUndoTarget undoEditing:]):
        (-[WebEditorUndoTarget redoEditing:]):
        (undoNameForEditAction):
        (WebEditorClient::registerCommandForUndoOrRedo):
        (WebEditorClient::registerCommandForUndo):
        (WebEditorClient::registerCommandForRedo):
        (WebEditorClient::clearUndoRedoOperations):
        (WebEditorClient::canUndo):
        (WebEditorClient::canRedo):
        (WebEditorClient::undo):
        (WebEditorClient::redo):
        * WebCoreSupport/WebFrameBridge.mm:
        * WebKit.xcodeproj/project.pbxproj:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@17767 268f45cc-cd09-0410-ab3c-d52691b4dbfc