Adjust indentation two spaces for DocumentXMLTreeViewer.js.

Change-Id: I3e30b0c29dea6dd6db8657c7236505968dd22274
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2084726
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746556}

third_party/blink/renderer/core/xml/DocumentXMLTreeViewer.js

@@ -48,7 +48,8 @@ function sourceXMLLoaded()
 {
   var sourceXML = document.getElementById('webkit-xml-viewer-source-xml');
   if (!sourceXML)
-        return; // Stop if some XML tree extension is already processing this document
+    return;  // Stop if some XML tree extension is already processing this
+             // document
 
   for (var child = sourceXML.firstChild; child; child = child.nextSibling)
     processNode(tree, child);
@@ -270,12 +271,10 @@ function createAttribute(attributeNode)
 
 function toggleFunction(sectionId) {
   return function() {
-        var foldedContent =
-            document.querySelector('#' + sectionId + ' > .folded');
-        var openedContent =
-            document.querySelector('#' + sectionId + ' > .opened');
-        var folderButton = document.querySelector(
-            '#' + sectionId + ' > .line > .folder-button');
+    var foldedContent = document.querySelector('#' + sectionId + ' > .folded');
+    var openedContent = document.querySelector('#' + sectionId + ' > .opened');
+    var folderButton =
+        document.querySelector('#' + sectionId + ' > .line > .folder-button');
 
     if (foldedContent) {
       if (foldedContent.className.includes('hidden'))