Remove support for logging into a memory buffer.

tools/splaytree.js

Index: tools/splaytree.js
diff --git a/tools/splaytree.js b/tools/splaytree.js
index 1c9aab9e2eb37d47cad773e9b1e7cb11adcfec74..d272a9e18279bd5add5a95c0a33d784eb8a2cef7 100644
--- a/tools/splaytree.js
+++ b/tools/splaytree.js
@@ -191,6 +191,17 @@ SplayTree.prototype.findGreatestLessThan = function(key) {
 
 
 /**
+ * @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() {