Revert NotImplemented() changes in r383029 and r383047.

third_party/WebKit/Source/core/testing/CoreTestPrinters.cpp

 // Copyright 2015 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/editing/Position.h"
+#include "core/dom/Document.h"
+#include "core/dom/Range.h"
+#include "core/dom/Text.h"
+#include "core/html/HTMLElement.h"
+#include "wtf/text/StringBuilder.h"
 #include <ios>
 #include <ostream> // NOLINT
 
 namespace blink {
 
 namespace {
 
+// Copied from "dom/Node.cpp".
+void appendAttributeDesc(const Node& node, StringBuilder& stringBuilder, const QualifiedName& name, const char* attrDesc)
+{
+    if (!node.isElementNode())
+        return;
+
+    String attr = toElement(node).getAttribute(name);
+    if (attr.isEmpty())
+        return;
+
+    stringBuilder.append(attrDesc);
+    stringBuilder.appendLiteral("=\"");
+    stringBuilder.append(attr);
+    stringBuilder.appendLiteral("\"");
+}
+
 template <typename PositionType>
 std::ostream& printPosition(std::ostream& ostream, const PositionType& position)
 {
     if (position.isNull())
         return ostream << "null";
     ostream << position.anchorNode() << "@";
     if (position.isOffsetInAnchor())
         return ostream << position.offsetInContainerNode();
     return ostream << position.anchorType();
 }
@@ skipping 11 matching lines @@
         return ostream << "beforeAnchor";
     case PositionAnchorType::BeforeChildren:
         return ostream << "beforeChildren";
     case PositionAnchorType::OffsetInAnchor:
         return ostream << "offsetInAnchor";
     }
     ASSERT_NOT_REACHED();
     return ostream << "anchorType=" << static_cast<int>(anchorType);
 }
 
+// |std::ostream| version of |Node::showNode|
+std::ostream& operator<<(std::ostream& ostream, const Node& node)
+{
+    ostream << node.nodeName().utf8().data();
+    if (node.isTextNode())
+        return ostream << " " << node.nodeValue();
+    StringBuilder attrs;
+    appendAttributeDesc(node, attrs, HTMLNames::idAttr, " ID");
+    appendAttributeDesc(node, attrs, HTMLNames::classAttr, " CLASS");
+    appendAttributeDesc(node, attrs, HTMLNames::styleAttr, " STYLE");
+    return ostream << attrs.toString().utf8().data();
+}
+
+std::ostream& operator<<(std::ostream& ostream, const Node* node)
+{
+    if (!node)
+        return ostream << "null";
+    return ostream << *node;
+}
+
 std::ostream& operator<<(std::ostream& ostream, const Position& position)
 {
     return printPosition(ostream, position);
 }
 
 std::ostream& operator<<(std::ostream& ostream, const PositionInFlatTree& position)
 {
     return printPosition(ostream, position);
 }
 
 } // namespace blink