static/ext/src/rtl/grid/RowEditor.js
function() {
        var grid = this.editingPlugin.grid,
            view = grid.normalGrid ? grid.normalGrid.view : grid.view,
            viewSize = view.componentLayout.lastComponentSize,
            hasOverflow = viewSize.contentHeight > viewSize.height;

        // Only work back past the incorrect right origin if there is overflow, and we're not in a locking grid
        // (if we are, the RowEditor is rendered to the outer container) and we're in RTL mode and we have the
        // X origin bug.
        return hasOverflow && !grid.normalGrid && grid.getHierarchyState().rtl && Ext.supports.xOriginBug ? -Ext.getScrollbarSize().width : 0;
    }
function() {
        var grid = this.editingPlugin.grid,
            view = grid.normalGrid ? grid.normalGrid.view : grid.view,
            viewSize = view.componentLayout.lastComponentSize,
            hasOverflow = viewSize.contentHeight > viewSize.height;

        // Only work back past the incorrect right origin if there is overflow, and we're not in a locking grid
        // (if we are, the RowEditor is rendered to the outer container) and we're in RTL mode and we have the
        // X origin bug.
        return hasOverflow && !grid.normalGrid && grid.getHierarchyState().rtl && Ext.supports.xOriginBug ? -Ext.getScrollbarSize().width : 0;
    }
Workaround for http://code.google.com/p/chromium/issues/detail?id=174656