Devtools[LayoutEditor]: Rework layout-editor workflow

Source/devtools/front_end/sdk/DOMModel.js

Index: Source/devtools/front_end/sdk/DOMModel.js
diff --git a/Source/devtools/front_end/sdk/DOMModel.js b/Source/devtools/front_end/sdk/DOMModel.js
index aec85a2d3bb4339c0397570197acb0f23340e69b..a5053eccd9c8a02d744a803c8415d4622f7918e7 100644
--- a/Source/devtools/front_end/sdk/DOMModel.js
+++ b/Source/devtools/front_end/sdk/DOMModel.js
@@ -1747,10 +1747,10 @@ WebInspector.DOMModel.prototype = {
 
     /**
      * @param {boolean} enabled
-     * @param {boolean} inspectUAShadowDOM
+     * @param {?string} mode
      * @param {function(?Protocol.Error)=} callback
      */
-    setInspectModeEnabled: function(enabled, inspectUAShadowDOM, callback)
+    setInspectModeEnabled: function(enabled, mode, callback)
     {
         /**
          * @this {WebInspector.DOMModel}
@@ -1758,7 +1758,7 @@ WebInspector.DOMModel.prototype = {
         function onDocumentAvailable()
         {
             this.dispatchEventToListeners(WebInspector.DOMModel.Events.InspectModeWillBeToggled, enabled);
-            this._highlighter.setInspectModeEnabled(enabled, inspectUAShadowDOM, this._buildHighlightConfig(), callback);
+            this._highlighter.setInspectModeEnabled(enabled, mode, this._buildHighlightConfig(), callback);
         }
         this.requestDocument(onDocumentAvailable.bind(this));
     },
@@ -2102,11 +2102,11 @@ WebInspector.DOMNodeHighlighter.prototype = {
 
     /**
      * @param {boolean} enabled
-     * @param {boolean} inspectUAShadowDOM
+     * @param {?string} mode
      * @param {!DOMAgent.HighlightConfig} config
      * @param {function(?Protocol.Error)=} callback
      */
-    setInspectModeEnabled: function(enabled, inspectUAShadowDOM, config, callback) {},
+    setInspectModeEnabled: function(enabled, mode, config, callback) {},
 
     /**
      * @param {!PageAgent.FrameId} frameId
@@ -2143,13 +2143,13 @@ WebInspector.DefaultDOMNodeHighlighter.prototype = {
     /**
      * @override
      * @param {boolean} enabled
-     * @param {boolean} inspectUAShadowDOM
+     * @param {?string} mode

[dgozman, 2015/08/28 23:44:11]

string|undefined

[sergeyv, 2015/09/02 00:40:58]

Not actual anymore

      * @param {!DOMAgent.HighlightConfig} config
      * @param {function(?Protocol.Error)=} callback
      */
-    setInspectModeEnabled: function(enabled, inspectUAShadowDOM, config, callback)
+    setInspectModeEnabled: function(enabled, mode, config, callback)
     {
-        this._agent.setInspectModeEnabled(enabled, inspectUAShadowDOM, config, callback);
+        this._agent.setInspectModeEnabled(enabled, mode || undefined, config, callback);
     },
 
     /**