Make "three snapshot technique" work on heap snapshots loaded from files

Source/devtools/front_end/HeapSnapshotView.js

 /*
  * Copyright (C) 2011 Google Inc. 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
@@ skipping 640 matching lines @@
 
     _updateBaseOptions: function()
     {
         var list = this._profiles();
         // We're assuming that snapshots can only be added.
         if (this.baseSelect.size() === list.length)
             return;
 
         for (var i = this.baseSelect.size(), n = list.length; i < n; ++i) {
             var title = list[i].title;
-            if (WebInspector.ProfilesPanelDescriptor.isUserInitiatedProfile(title))
-                title = WebInspector.UIString("Snapshot %d", WebInspector.ProfilesPanelDescriptor.userInitiatedProfileIndex(title));
             this.baseSelect.createOption(title);
         }
     },
 
     _updateFilterOptions: function()
     {
         var list = this._profiles();
         // We're assuming that snapshots can only be added.
         if (this.filterSelect.size() - 1 === list.length)
             return;
 
         if (!this.filterSelect.size())
             this.filterSelect.createOption(WebInspector.UIString("All objects"));
 
-        if (this.profile.fromFile())
-            return;
         for (var i = this.filterSelect.size() - 1, n = list.length; i < n; ++i) {
-            var profile = list[i];
             var title = list[i].title;
-            if (WebInspector.ProfilesPanelDescriptor.isUserInitiatedProfile(title)) {
-                var profileIndex = WebInspector.ProfilesPanelDescriptor.userInitiatedProfileIndex(title);
-                if (!i)
-                    title = WebInspector.UIString("Objects allocated before Snapshot %d", profileIndex);
-                else
-                    title = WebInspector.UIString("Objects allocated between Snapshots %d and %d", profileIndex - 1, profileIndex);
-            }
+            if (!i)
+                title = WebInspector.UIString("Objects allocated before %s", title);
+            else
+                title = WebInspector.UIString("Objects allocated between %s and %s", list[i - 1].title, title);
             this.filterSelect.createOption(title);
         }
     },
 
     /**
      * @param {WebInspector.Event} event
      */
     _onProfileHeaderAdded: function(event)
     {
         if (!event.data || event.data.type !== this._profileTypeId)
@@ skipping 603 matching lines @@
     _snapshotReceived: function(snapshotProxy)
     {
         this._receiver = null;
         if (snapshotProxy)
             this._snapshotProxy = snapshotProxy;
         this._didCompleteSnapshotTransfer();
         var worker = /** @type {WebInspector.HeapSnapshotWorkerProxy} */ (this._snapshotProxy.worker);
         this.isTemporary = false;
         worker.startCheckingForLongRunningCalls();
         this.notifySnapshotReceived();
+
+        if (this.fromFile()) {
+            function didGetMaxNodeId(id)
+            {
+               this.maxJSObjectId = id;
+            }
+            snapshotProxy.maxJsNodeId(didGetMaxNodeId.bind(this));
+        }
     },
 
     notifySnapshotReceived: function()
     {
         this._profileType._snapshotReceived(this);
     },
 
     finishHeapSnapshot: function()
     {
         if (this._transferHandler) {
@@ skipping 31 matching lines @@
         this._fileName = this._fileName || "Heap-" + new Date().toISO8601Compact() + this._profileType.fileExtension();
         fileOutputStream.open(this._fileName, onOpen.bind(this));
     },
 
     /**
      * @override
      * @param {File} file
      */
     loadFromFile: function(file)
     {
-        this.title = file.name;
         this.sidebarElement.subtitle = WebInspector.UIString("Loading\u2026");
         this.sidebarElement.wait = true;
         this._setupWorker();
 
         var delegate = new WebInspector.HeapSnapshotLoadFromFileDelegate(this);
         var fileReader = this._createFileReader(file, delegate);
         fileReader.start(this._receiver);
     },
 
     _createFileReader: function(file, delegate)
@@ skipping 472 matching lines @@
     zeroTime: function()
     {
         return this._minimumBoundaries;
     },
 
     boundarySpan: function()
     {
         return this._maximumBoundaries - this._minimumBoundaries;
     }
 }