1 files changed, 0 insertions, 91 deletions
diff --git a/dom/heapsnapshot/shortest-paths.js b/dom/heapsnapshot/shortest-paths.js
deleted file mode 100644
index 2d97b7de9..000000000
--- a/dom/heapsnapshot/shortest-paths.js
+++ /dev/null
@@ -1,91 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-"use strict";
-
-/**
- * Compress a set of paths leading to `target` into a single graph, returned as
- * a set of nodes and a set of edges.
- *
- * @param {NodeId} target
- *        The target node passed to `HeapSnapshot.computeShortestPaths`.
- *
- * @param {Array<Path>} paths
- *        An array of paths to `target`, as returned by
- *        `HeapSnapshot.computeShortestPaths`.
- *
- * @returns {Object}
- *          An object with two properties:
- *          - edges: An array of unique objects of the form:
- *              {
- *                 from: <node ID>,
- *                 to: <node ID>,
- *                 name: <string or null>
- *              }
- *          - nodes: An array of unique node IDs. Every `from` and `to` id is
- *            guaranteed to be in this array exactly once.
- */
-exports.deduplicatePaths = function (target, paths) {
-  // Use this structure to de-duplicate edges among many retaining paths from
-  // start to target.
-  //
-  // Map<FromNodeId, Map<ToNodeId, Set<EdgeName>>>
-  const deduped = new Map();
-
-  function insert(from, to, name) {
-    let toMap = deduped.get(from);
-    if (!toMap) {
-      toMap = new Map();
-      deduped.set(from, toMap);
-    }
-
-    let nameSet = toMap.get(to);
-    if (!nameSet) {
-      nameSet = new Set();
-      toMap.set(to, nameSet);
-    }
-
-    nameSet.add(name);
-  }
-
-  outer: for (let path of paths) {
-    const pathLength = path.length;
-
-    // Check for duplicate predecessors in the path, and skip paths that contain
-    // them.
-    const predecessorsSeen = new Set();
-    predecessorsSeen.add(target);
-    for (let i = 0; i < pathLength; i++) {
-      if (predecessorsSeen.has(path[i].predecessor)) {
-        continue outer;
-      }
-      predecessorsSeen.add(path[i].predecessor);
-    }
-
-    for (let i = 0; i < pathLength - 1; i++) {
-      insert(path[i].predecessor, path[i + 1].predecessor, path[i].edge);
-    }
-
-    insert(path[pathLength - 1].predecessor, target, path[pathLength - 1].edge);
-  }
-
-  const nodes = [target];
-  const edges = [];
-
-  for (let [from, toMap] of deduped) {
-    // If the second/third/etc shortest path contains the `target` anywhere
-    // other than the very last node, we could accidentally put the `target` in
-    // `nodes` more than once.
-    if (from !== target) {
-      nodes.push(from);
-    }
-
-    for (let [to, edgeNameSet] of toMap) {
-      for (let name of edgeNameSet) {
-        edges.push({ from, to, name });
-      }
-    }
-  }
-
-  return { nodes, edges };
-};