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

Source/devtools/front_end/ProfilesPanelDescriptor.js

 /*
  * Copyright (C) 2013 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 35 matching lines @@
 }
 
 WebInspector.ProfilesPanelDescriptor.ShortcutKeys = {
     StartStopRecording: [
         WebInspector.KeyboardShortcut.makeDescriptor("e", WebInspector.KeyboardShortcut.Modifiers.CtrlOrMeta)
     ]
 }
 
 WebInspector.ProfilesPanelDescriptor.ProfileURLRegExp = /webkit-profile:\/\/(.+)\/(.+)/;
 
-WebInspector.ProfilesPanelDescriptor.UserInitiatedProfileName = "org.webkit.profiles.user-initiated";
-
-/**
- * @param {string} title
- * @return {boolean}
- */
-WebInspector.ProfilesPanelDescriptor.isUserInitiatedProfile = function(title)
-{
-    return title.startsWith(WebInspector.ProfilesPanelDescriptor.UserInitiatedProfileName);
-}
-
-/**
- * @param {string} title
- * @return {number}
- * @throws {string}
- */
-WebInspector.ProfilesPanelDescriptor.userInitiatedProfileIndex = function(title)
-{
-    if (!WebInspector.ProfilesPanelDescriptor.isUserInitiatedProfile(title))
-        throw "Not user-initiated profile title.";
-    var suffix = title.substring(WebInspector.ProfilesPanelDescriptor.UserInitiatedProfileName.length + 1);
-    return parseInt(suffix, 10);
-}
-
 /**
  * @param {string} title
  * @return {string}
  */
 WebInspector.ProfilesPanelDescriptor.resolveProfileTitle = function(title)
 {
-    if (!WebInspector.ProfilesPanelDescriptor.isUserInitiatedProfile(title))
-        return title;
-    return WebInspector.UIString("Profile %d", WebInspector.ProfilesPanelDescriptor.userInitiatedProfileIndex(title));
+    return title;
 }
 
 /**
  * @param {Event} event
  */
 WebInspector.ProfilesPanelDescriptor._openCPUProfile = function(event)
 {
     event.preventDefault();
     var panel = WebInspector.showPanel("profiles");
     var link = /** @type {!Element} */ (event.target);
@@ skipping 19 matching lines @@
     link.href = WebInspector.UIString("show CPU profile");
     link.target = "_blank";
     if (tooltipText)
         link.title = tooltipText;
     link.timeLeft = timeLeft;
     link.timeRight = timeRight;
     link.profileUID = uid;
     link.addEventListener("click", WebInspector.ProfilesPanelDescriptor._openCPUProfile, true);
     return link;
 }