Devtools: Create a separate mode to turn LayoutEditor on

Source/core/inspector/InspectorDOMAgent.cpp

Index: Source/core/inspector/InspectorDOMAgent.cpp
diff --git a/Source/core/inspector/InspectorDOMAgent.cpp b/Source/core/inspector/InspectorDOMAgent.cpp
index 2fc32b75f0c0026efa3ea28997b39bcd4a2176e4..ef5031e94b2cf942e502c76bccbd6d3f22b4b70e 100644
--- a/Source/core/inspector/InspectorDOMAgent.cpp
+++ b/Source/core/inspector/InspectorDOMAgent.cpp
@@ -1220,15 +1220,10 @@ bool InspectorDOMAgent::handleMouseMove(LocalFrame* frame, const PlatformMouseEv
 
 void InspectorDOMAgent::setSearchingForNode(ErrorString* errorString, SearchMode searchMode, JSONObject* highlightInspectorObject)
 {
-    if (m_searchingForNode == searchMode)
-        return;
-
     m_searchingForNode = searchMode;
     m_overlay->setInspectModeEnabled(searchMode != NotSearching);
     if (searchMode != NotSearching) {
         m_inspectModeHighlightConfig = highlightConfigFromInspectorObject(errorString, highlightInspectorObject);
-        if (!m_inspectModeHighlightConfig)
-            return;
     } else {
         m_hoveredNodeForInspectMode.clear();
         hideHighlight(errorString);