function _getBrowserDiff(editor, browserSimpleDOM) {
        var cachedValue = _cachedValues[editor.document.file.fullPath],
            editorRoot  = cachedValue.dom,
            browserRoot;

        browserRoot = _processBrowserSimpleDOM(browserSimpleDOM, editorRoot.tagID);

        return {
            diff    : HTMLDOMDiff.domdiff(editorRoot, browserRoot),
            browser : browserRoot,
            editor  : editorRoot
        };
    }
@private
Diff the browser DOM with the in-editor DOM
@param {Editor} editor
@param {Object} browserSimpleDOM