Move DocumentXMLTreeViewer off of private script

third_party/WebKit/Source/core/xml/DocumentXMLTreeViewer.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/xml/DocumentXMLTreeViewer.h"
+
+#include "bindings/core/v8/DOMWrapperWorld.h"
+#include "bindings/core/v8/ScriptController.h"
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "bindings/core/v8/V8PerIsolateData.h"
+#include "core/dom/Document.h"
+#include "core/dom/Element.h"
+#include "core/frame/LocalFrame.h"
+#include "platform/PlatformResourceLoader.h"
+
+namespace blink {
+
+void transformDocumentToXMLTreeView(Document& document) {
+  String scriptString = loadResourceAsASCIIString("DocumentXMLTreeViewer.js");
+  String cssString = loadResourceAsASCIIString("DocumentXMLTreeViewer.css");
+
+  HeapVector<ScriptSourceCode> sources;
+  sources.append(ScriptSourceCode(scriptString));
+  v8::HandleScope handleScope(V8PerIsolateData::mainThreadIsolate());
+
+  document.frame()->script().executeScriptInIsolatedWorld(
+      WorldIdConstants::DocumentXMLTreeViewerWorldId, sources, 0, nullptr);
+
+  Element* element = document.getElementById("xml-viewer-style");
+  if (element) {
+    element->setTextContent(cssString);
+  }
+}
+
+}  // namespace blink