Remove support for logging into a memory buffer.

tools/splaytree.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 173 matching lines @@
     return this.root_;
   } else if (this.root_.left) {
     return this.findMax(this.root_.left);
   } else {
     return null;
   }
 };
 
 
 /**
+ * @return {Array<*>} An array containing all the values of tree's nodes paired
+ *     with keys.
+ */
+SplayTree.prototype.exportKeysAndValues = function() {
+  var result = [];
+  this.traverse_(function(node) { result.push([node.key, node.value]); });
+  return result;
+};
+
+
+/**
  * @return {Array<*>} An array containing all the values of tree's nodes.
  */
 SplayTree.prototype.exportValues = function() {
   var result = [];
   this.traverse_(function(node) { result.push(node.value); });
   return result;
 };
 
 
 /**
@@ skipping 103 matching lines @@
 /**
  * @type {SplayTree.Node}
  */
 SplayTree.Node.prototype.left = null;
 
 
 /**
  * @type {SplayTree.Node}
  */
 SplayTree.Node.prototype.right = null;