Devtools[LayoutEditor]: Keep LayoutEditor in sync with a node selected in ElementsPanel

third_party/WebKit/Source/web/InspectorOverlay.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 319 matching lines @@
     scheduleUpdate();
 
     if (searchMode != InspectorDOMAgent::NotSearching) {
         m_inspectModeHighlightConfig = highlightConfig;
     } else {
         m_hoveredNodeForInspectMode.clear();
         hideHighlight();
     }
 }
 
+void InspectorOverlay::setInspectedNode(Node* node)
+{
+    if (m_inspectMode != InspectorDOMAgent::ShowLayoutEditor || (m_layoutEditor && m_layoutEditor->element() == node))
+        return;
+
+    if (m_layoutEditor) {
+        m_layoutEditor->commitChanges();
+        m_layoutEditor.clear();
+    }
+    initializeLayoutEditorIfNeeded(node);
+}
+
 void InspectorOverlay::highlightQuad(PassOwnPtr<FloatQuad> quad, const InspectorHighlightConfig& highlightConfig)
 {
     m_quadHighlightConfig = highlightConfig;
     m_highlightQuad = quad;
     m_omitTooltip = false;
     scheduleUpdate();
 }
 
 bool InspectorOverlay::isEmpty()
 {
@@ skipping 368 matching lines @@
 bool InspectorOverlay::shouldSearchForNode()
 {
     return m_inspectMode != InspectorDOMAgent::NotSearching && !m_layoutEditor;
 }
 
 void InspectorOverlay::inspect(Node* node)
 {
     if (m_domAgent)
         m_domAgent->inspect(node);
 
+    initializeLayoutEditorIfNeeded(node);
+    if (m_layoutEditor)
+        hideHighlight();
+}
+
+void InspectorOverlay::initializeLayoutEditorIfNeeded(Node* node)
+{
     if (node && node->isElementNode() && m_inspectMode == InspectorDOMAgent::ShowLayoutEditor && !m_layoutEditor) {
         m_layoutEditor = LayoutEditor::create(toElement(node), m_cssAgent, m_domAgent, &overlayMainFrame()->script());
         toChromeClientImpl(m_webViewImpl->page()->chromeClient()).setCursorOverridden(true);
-        hideHighlight();
     }
 }
 
 } // namespace blink