DevTools: reformat front-end code to match chromium style.

third_party/WebKit/Source/devtools/front_end/Runtime.js

Index: third_party/WebKit/Source/devtools/front_end/Runtime.js
diff --git a/third_party/WebKit/Source/devtools/front_end/Runtime.js b/third_party/WebKit/Source/devtools/front_end/Runtime.js
index ccf619dbd8e2a7b278fea231a373046e0b4ad00f..c3185964f528aa003750b1b68fc12a9cf7395ebe 100644
--- a/third_party/WebKit/Source/devtools/front_end/Runtime.js
+++ b/third_party/WebKit/Source/devtools/front_end/Runtime.js
@@ -27,7 +27,6 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
 // This gets all concatenated module descriptors in the release mode.
 var allDescriptors = [];
 var applicationDescriptor;
@@ -36,19 +35,22 @@ var _loadedScripts = {};
 // FIXME: This is a workaround to force Closure compiler provide
 // the standard ES6 runtime for all modules. This should be removed
 // once Closure provides standard externs for Map et al.
-for (var k of []) {}
+for (var k of []) {
+}
 
 (function() {
-    var baseUrl = self.location ? self.location.origin + self.location.pathname : "";
-    self._importScriptPathPrefix = baseUrl.substring(0, baseUrl.lastIndexOf("/") + 1);
+  var baseUrl = self.location ? self.location.origin + self.location.pathname : '';
+  self._importScriptPathPrefix = baseUrl.substring(0, baseUrl.lastIndexOf('/') + 1);
 })();
 
 /**
- * @constructor
- * @param {!Array.<!Runtime.ModuleDescriptor>} descriptors
+ * @unrestricted
  */
-function Runtime(descriptors)
-{
+var Runtime = class {
+  /**
+   * @param {!Array.<!Runtime.ModuleDescriptor>} descriptors
+   */
+  constructor(descriptors) {
     /** @type {!Array<!Runtime.Module>} */
     this._modules = [];
     /** @type {!Object<string, !Runtime.Module>} */
@@ -61,83 +63,79 @@ function Runtime(descriptors)
     this._descriptorsMap = {};
 
     for (var i = 0; i < descriptors.length; ++i)
-        this._registerModule(descriptors[i]);
-}
-
-/**
- * @param {string} url
- * @return {!Promise.<string>}
- */
-Runtime.loadResourcePromise = function(url)
-{
+      this._registerModule(descriptors[i]);
+  }
+
+  /**
+   * @param {string} url
+   * @return {!Promise.<string>}
+   */
+  static loadResourcePromise(url) {
     return new Promise(load);
 
     /**
      * @param {function(?)} fulfill
      * @param {function(*)} reject
      */
-    function load(fulfill, reject)
-    {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", url, true);
-        xhr.onreadystatechange = onreadystatechange;
-
-        /**
-         * @param {Event} e
-         */
-        function onreadystatechange(e)
-        {
-            if (xhr.readyState !== XMLHttpRequest.DONE)
-                return;
-
-            if ([0, 200, 304].indexOf(xhr.status) === -1)  // Testing harness file:/// results in 0.
-                reject(new Error("While loading from url " + url + " server responded with a status of " + xhr.status));
-            else
-                fulfill(e.target.response);
-        }
-        xhr.send(null);
+    function load(fulfill, reject) {
+      var xhr = new XMLHttpRequest();
+      xhr.open('GET', url, true);
+      xhr.onreadystatechange = onreadystatechange;
+
+      /**
+       * @param {Event} e
+       */
+      function onreadystatechange(e) {
+        if (xhr.readyState !== XMLHttpRequest.DONE)
+          return;
+
+        if ([0, 200, 304].indexOf(xhr.status) === -1)  // Testing harness file:/// results in 0.
+          reject(new Error('While loading from url ' + url + ' server responded with a status of ' + xhr.status));
+        else
+          fulfill(e.target.response);
+      }
+      xhr.send(null);
     }
-};
+  }
 
-/**
- * http://tools.ietf.org/html/rfc3986#section-5.2.4
- * @param {string} path
- * @return {string}
- */
-Runtime.normalizePath = function(path)
-{
-    if (path.indexOf("..") === -1 && path.indexOf(".") === -1)
-        return path;
+  /**
+   * http://tools.ietf.org/html/rfc3986#section-5.2.4
+   * @param {string} path
+   * @return {string}
+   */
+  static normalizePath(path) {
+    if (path.indexOf('..') === -1 && path.indexOf('.') === -1)
+      return path;
 
     var normalizedSegments = [];
-    var segments = path.split("/");
+    var segments = path.split('/');
     for (var i = 0; i < segments.length; i++) {
-        var segment = segments[i];
-        if (segment === ".")
-            continue;
-        else if (segment === "..")
-            normalizedSegments.pop();
-        else if (segment)
-            normalizedSegments.push(segment);
+      var segment = segments[i];
+      if (segment === '.')
+        continue;
+      else if (segment === '..')
+        normalizedSegments.pop();
+      else if (segment)
+        normalizedSegments.push(segment);
     }
-    var normalizedPath = normalizedSegments.join("/");
-    if (normalizedPath[normalizedPath.length - 1] === "/")
-        return normalizedPath;
-    if (path[0] === "/" && normalizedPath)
-        normalizedPath = "/" + normalizedPath;
-    if ((path[path.length - 1] === "/") || (segments[segments.length - 1] === ".") || (segments[segments.length - 1] === ".."))
-        normalizedPath = normalizedPath + "/";
+    var normalizedPath = normalizedSegments.join('/');
+    if (normalizedPath[normalizedPath.length - 1] === '/')
+      return normalizedPath;
+    if (path[0] === '/' && normalizedPath)
+      normalizedPath = '/' + normalizedPath;
+    if ((path[path.length - 1] === '/') || (segments[segments.length - 1] === '.') ||
+        (segments[segments.length - 1] === '..'))
+      normalizedPath = normalizedPath + '/';
 
     return normalizedPath;
-};
-
-/**
- * @param {!Array.<string>} scriptNames
- * @param {string=} base
- * @return {!Promise.<undefined>}
- */
-Runtime._loadScriptsPromise = function(scriptNames, base)
-{
+  }
+
+  /**
+   * @param {!Array.<string>} scriptNames
+   * @param {string=} base
+   * @return {!Promise.<undefined>}
+   */
+  static _loadScriptsPromise(scriptNames, base) {
     /** @type {!Array<!Promise<undefined>>} */
     var promises = [];
     /** @type {!Array<string>} */
@@ -145,19 +143,20 @@ Runtime._loadScriptsPromise = function(scriptNames, base)
     var sources = new Array(scriptNames.length);
     var scriptToEval = 0;
     for (var i = 0; i < scriptNames.length; ++i) {
-        var scriptName = scriptNames[i];
-        var sourceURL = (base || self._importScriptPathPrefix) + scriptName;
-
-        var schemaIndex = sourceURL.indexOf("://") + 3;
-        var pathIndex = sourceURL.indexOf("/", schemaIndex);
-        if (pathIndex === -1)
-            pathIndex = sourceURL.length;
-        sourceURL = sourceURL.substring(0, pathIndex) + Runtime.normalizePath(sourceURL.substring(pathIndex));
-
-        if (_loadedScripts[sourceURL])
-            continue;
-        urls.push(sourceURL);
-        promises.push(Runtime.loadResourcePromise(sourceURL).then(scriptSourceLoaded.bind(null, i), scriptSourceLoaded.bind(null, i, undefined)));
+      var scriptName = scriptNames[i];
+      var sourceURL = (base || self._importScriptPathPrefix) + scriptName;
+
+      var schemaIndex = sourceURL.indexOf('://') + 3;
+      var pathIndex = sourceURL.indexOf('/', schemaIndex);
+      if (pathIndex === -1)
+        pathIndex = sourceURL.length;
+      sourceURL = sourceURL.substring(0, pathIndex) + Runtime.normalizePath(sourceURL.substring(pathIndex));
+
+      if (_loadedScripts[sourceURL])
+        continue;
+      urls.push(sourceURL);
+      promises.push(Runtime.loadResourcePromise(sourceURL).then(
+          scriptSourceLoaded.bind(null, i), scriptSourceLoaded.bind(null, i, undefined)));
     }
     return Promise.all(promises).then(undefined);
 
@@ -165,88 +164,71 @@ Runtime._loadScriptsPromise = function(scriptNames, base)
      * @param {number} scriptNumber
      * @param {string=} scriptSource
      */
-    function scriptSourceLoaded(scriptNumber, scriptSource)
-    {
-        sources[scriptNumber] = scriptSource || "";
-        // Eval scripts as fast as possible.
-        while (typeof sources[scriptToEval] !== "undefined") {
-            evaluateScript(urls[scriptToEval], sources[scriptToEval]);
-            ++scriptToEval;
-        }
+    function scriptSourceLoaded(scriptNumber, scriptSource) {
+      sources[scriptNumber] = scriptSource || '';
+      // Eval scripts as fast as possible.
+      while (typeof sources[scriptToEval] !== 'undefined') {
+        evaluateScript(urls[scriptToEval], sources[scriptToEval]);
+        ++scriptToEval;
+      }
     }
 
     /**
      * @param {string} sourceURL
      * @param {string=} scriptSource
      */
-    function evaluateScript(sourceURL, scriptSource)
-    {
-        _loadedScripts[sourceURL] = true;
-        if (!scriptSource) {
-            // Do not reject, as this is normal in the hosted mode.
-            console.error("Empty response arrived for script '" + sourceURL + "'");
-            return;
-        }
-        self.eval(scriptSource + "\n//# sourceURL=" + sourceURL);
+    function evaluateScript(sourceURL, scriptSource) {
+      _loadedScripts[sourceURL] = true;
+      if (!scriptSource) {
+        // Do not reject, as this is normal in the hosted mode.
+        console.error('Empty response arrived for script \'' + sourceURL + '\'');
+        return;
+      }
+      self.eval(scriptSource + '\n//# sourceURL=' + sourceURL);
     }
-};
-
-/**
- * @type {!Object.<string, string>}
- */
-Runtime._queryParamsObject = { __proto__: null };
+  }
 
-Runtime._instanceSymbol = Symbol("instance");
-Runtime._extensionSymbol = Symbol("extension");
-
-/**
- * @type {!Object.<string, string>}
- */
-Runtime.cachedResources = { __proto__: null };
-
-/**
- * @param {string} url
- * @param {boolean} appendSourceURL
- * @return {!Promise<undefined>}
- */
-Runtime.loadResourceIntoCache = function(url, appendSourceURL)
-{
-    return Runtime.loadResourcePromise(url).then(cacheResource.bind(this, url), cacheResource.bind(this, url, undefined));
+  /**
+   * @param {string} url
+   * @param {boolean} appendSourceURL
+   * @return {!Promise<undefined>}
+   */
+  static loadResourceIntoCache(url, appendSourceURL) {
+    return Runtime.loadResourcePromise(url).then(
+        cacheResource.bind(this, url), cacheResource.bind(this, url, undefined));
 
     /**
      * @param {string} path
      * @param {string=} content
      */
-    function cacheResource(path, content)
-    {
-        if (!content) {
-            console.error("Failed to load resource: " + path);
-            return;
-        }
-        var sourceURL = appendSourceURL ? Runtime.resolveSourceURL(path) : "";
-        Runtime.cachedResources[path] = content + sourceURL;
+    function cacheResource(path, content) {
+      if (!content) {
+        console.error('Failed to load resource: ' + path);
+        return;
+      }
+      var sourceURL = appendSourceURL ? Runtime.resolveSourceURL(path) : '';
+      Runtime.cachedResources[path] = content + sourceURL;
     }
-};
+  }
 
-/**
- * @param {string} appName
- * @return {!Promise.<undefined>}
- */
-Runtime.startApplication = function(appName)
-{
-    console.timeStamp("Runtime.startApplication");
+  /**
+   * @param {string} appName
+   * @return {!Promise.<undefined>}
+   */
+  static startApplication(appName) {
+    console.timeStamp('Runtime.startApplication');
 
     var allDescriptorsByName = {};
     for (var i = 0; i < allDescriptors.length; ++i) {
-        var d = allDescriptors[i];
-        allDescriptorsByName[d["name"]] = d;
+      var d = allDescriptors[i];
+      allDescriptorsByName[d['name']] = d;
     }
 
     var applicationPromise;
     if (applicationDescriptor)
-        applicationPromise = Promise.resolve(applicationDescriptor);
+      applicationPromise = Promise.resolve(applicationDescriptor);
     else
-        applicationPromise = Runtime.loadResourcePromise(appName + ".json").then(JSON.parse.bind(JSON));
+      applicationPromise = Runtime.loadResourcePromise(appName + '.json').then(JSON.parse.bind(JSON));
 
     return applicationPromise.then(parseModuleDescriptors);
 
@@ -254,348 +236,378 @@ Runtime.startApplication = function(appName)
      * @param {!{modules: !Array.<!Object>, has_html: boolean}} appDescriptor
      * @return {!Promise.<undefined>}
      */
-    function parseModuleDescriptors(appDescriptor)
-    {
-        var configuration = appDescriptor.modules;
-        var moduleJSONPromises = [];
-        var coreModuleNames = [];
-        for (var i = 0; i < configuration.length; ++i) {
-            var descriptor = configuration[i];
-            var name = descriptor["name"];
-            var moduleJSON = allDescriptorsByName[name];
-            if (moduleJSON)
-                moduleJSONPromises.push(Promise.resolve(moduleJSON));
-            else
-                moduleJSONPromises.push(Runtime.loadResourcePromise(name + "/module.json").then(JSON.parse.bind(JSON)));
-            if (descriptor["type"] === "autostart")
-                coreModuleNames.push(name);
-        }
-
-        return Promise.all(moduleJSONPromises).then(instantiateRuntime);
-
-        /**
-         * @param {!Array.<!Object>} moduleDescriptors
-         * @return {!Promise.<undefined>}
-         */
-        function instantiateRuntime(moduleDescriptors)
-        {
-            for (var i = 0; i < moduleDescriptors.length; ++i) {
-                moduleDescriptors[i].name = configuration[i]["name"];
-                moduleDescriptors[i].condition = configuration[i]["condition"];
-                moduleDescriptors[i].remote = configuration[i]["type"] === "remote";
-            }
-            self.runtime = new Runtime(moduleDescriptors);
-            if (coreModuleNames)
-                return /** @type {!Promise<undefined>} */ (self.runtime._loadAutoStartModules(coreModuleNames));
-            return Promise.resolve();
+    function parseModuleDescriptors(appDescriptor) {
+      var configuration = appDescriptor.modules;
+      var moduleJSONPromises = [];
+      var coreModuleNames = [];
+      for (var i = 0; i < configuration.length; ++i) {
+        var descriptor = configuration[i];
+        var name = descriptor['name'];
+        var moduleJSON = allDescriptorsByName[name];
+        if (moduleJSON)
+          moduleJSONPromises.push(Promise.resolve(moduleJSON));
+        else
+          moduleJSONPromises.push(Runtime.loadResourcePromise(name + '/module.json').then(JSON.parse.bind(JSON)));
+        if (descriptor['type'] === 'autostart')
+          coreModuleNames.push(name);
+      }
+
+      return Promise.all(moduleJSONPromises).then(instantiateRuntime);
+
+      /**
+       * @param {!Array.<!Object>} moduleDescriptors
+       * @return {!Promise.<undefined>}
+       */
+      function instantiateRuntime(moduleDescriptors) {
+        for (var i = 0; i < moduleDescriptors.length; ++i) {
+          moduleDescriptors[i].name = configuration[i]['name'];
+          moduleDescriptors[i].condition = configuration[i]['condition'];
+          moduleDescriptors[i].remote = configuration[i]['type'] === 'remote';
         }
+        self.runtime = new Runtime(moduleDescriptors);
+        if (coreModuleNames)
+          return /** @type {!Promise<undefined>} */ (self.runtime._loadAutoStartModules(coreModuleNames));
+        return Promise.resolve();
+      }
     }
-};
+  }
 
-/**
- * @param {string} appName
- * @return {!Promise.<undefined>}
- */
-Runtime.startWorker = function(appName)
-{
+  /**
+   * @param {string} appName
+   * @return {!Promise.<undefined>}
+   */
+  static startWorker(appName) {
     return Runtime.startApplication(appName).then(sendWorkerReady);
 
-    function sendWorkerReady()
-    {
-        self.postMessage("workerReady");
+    function sendWorkerReady() {
+      self.postMessage('workerReady');
     }
-};
+  }
 
-/** @type {?function(!MessagePort)} */
-Runtime._sharedWorkerNewPortCallback = null;
-/** @type {!Array<!MessagePort>} */
-Runtime._sharedWorkerConnectedPorts = [];
-
-/**
- * @param {string} appName
- */
-Runtime.startSharedWorker = function(appName)
-{
+  /**
+   * @param {string} appName
+   */
+  static startSharedWorker(appName) {
     var startPromise = Runtime.startApplication(appName);
 
     /**
      * @param {!MessageEvent} event
      */
-    self.onconnect = function(event)
-    {
-        var newPort = /** @type {!MessagePort} */ (event.ports[0]);
-        startPromise.then(sendWorkerReadyAndContinue);
-
-        function sendWorkerReadyAndContinue()
-        {
-            newPort.postMessage("workerReady");
-            if (Runtime._sharedWorkerNewPortCallback)
-                Runtime._sharedWorkerNewPortCallback.call(null, newPort);
-            else
-                Runtime._sharedWorkerConnectedPorts.push(newPort);
-        }
+    self.onconnect = function(event) {
+      var newPort = /** @type {!MessagePort} */ (event.ports[0]);
+      startPromise.then(sendWorkerReadyAndContinue);
+
+      function sendWorkerReadyAndContinue() {
+        newPort.postMessage('workerReady');
+        if (Runtime._sharedWorkerNewPortCallback)
+          Runtime._sharedWorkerNewPortCallback.call(null, newPort);
+        else
+          Runtime._sharedWorkerConnectedPorts.push(newPort);
+      }
     };
-};
+  }
 
-/**
- * @param {function(!MessagePort)} callback
- */
-Runtime.setSharedWorkerNewPortCallback = function(callback)
-{
+  /**
+   * @param {function(!MessagePort)} callback
+   */
+  static setSharedWorkerNewPortCallback(callback) {
     Runtime._sharedWorkerNewPortCallback = callback;
     while (Runtime._sharedWorkerConnectedPorts.length) {
-        var port = Runtime._sharedWorkerConnectedPorts.shift();
-        callback.call(null, port);
+      var port = Runtime._sharedWorkerConnectedPorts.shift();
+      callback.call(null, port);
     }
-};
+  }
 
-/**
- * @param {string} name
- * @return {?string}
- */
-Runtime.queryParam = function(name)
-{
+  /**
+   * @param {string} name
+   * @return {?string}
+   */
+  static queryParam(name) {
     return Runtime._queryParamsObject[name] || null;
-};
+  }
 
-/**
- * @return {!Object}
- */
-Runtime._experimentsSetting = function()
-{
+  /**
+   * @return {!Object}
+   */
+  static _experimentsSetting() {
     try {
-        return /** @type {!Object} */ (JSON.parse(self.localStorage && self.localStorage["experiments"] ? self.localStorage["experiments"] : "{}"));
+      return /** @type {!Object} */ (
+          JSON.parse(self.localStorage && self.localStorage['experiments'] ? self.localStorage['experiments'] : '{}'));
     } catch (e) {
-        console.error("Failed to parse localStorage['experiments']");
-        return {};
+      console.error('Failed to parse localStorage[\'experiments\']');
+      return {};
     }
-};
+  }
 
-Runtime._console = console;
-Runtime._originalAssert = console.assert;
-Runtime._assert = function(value, message)
-{
+  static _assert(value, message) {
     if (value)
-        return;
-    Runtime._originalAssert.call(Runtime._console, value, message + " " + new Error().stack);
-};
-
-Runtime._platform = "";
-
-/**
- * @param {string} platform
- */
-Runtime.setPlatform = function(platform)
-{
+      return;
+    Runtime._originalAssert.call(Runtime._console, value, message + ' ' + new Error().stack);
+  }
+
+  /**
+   * @param {string} platform
+   */
+  static setPlatform(platform) {
     Runtime._platform = platform;
-};
+  }
+
+  /**
+   * @param {!Object} descriptor
+   * @return {boolean}
+   */
+  static _isDescriptorEnabled(descriptor) {
+    var activatorExperiment = descriptor['experiment'];
+    if (activatorExperiment === '*')
+      return Runtime.experiments.supportEnabled();
+    if (activatorExperiment && activatorExperiment.startsWith('!') &&
+        Runtime.experiments.isEnabled(activatorExperiment.substring(1)))
+      return false;
+    if (activatorExperiment && !activatorExperiment.startsWith('!') &&
+        !Runtime.experiments.isEnabled(activatorExperiment))
+      return false;
+    var condition = descriptor['condition'];
+    if (condition && !condition.startsWith('!') && !Runtime.queryParam(condition))
+      return false;
+    if (condition && condition.startsWith('!') && Runtime.queryParam(condition.substring(1)))
+      return false;
+    return true;
+  }
 
-Runtime.prototype = {
-    useTestBase: function()
-    {
-        Runtime._remoteBase = "http://localhost:8000/inspector-sources/";
-        if (Runtime.queryParam("debugFrontend"))
-            Runtime._remoteBase += "debug/";
-    },
+  /**
+   * @param {string} path
+   * @return {string}
+   */
+  static resolveSourceURL(path) {
+    var sourceURL = self.location.href;
+    if (self.location.search)
+      sourceURL = sourceURL.replace(self.location.search, '');
+    sourceURL = sourceURL.substring(0, sourceURL.lastIndexOf('/') + 1) + path;
+    return '\n/*# sourceURL=' + sourceURL + ' */';
+  }
+
+  useTestBase() {
+    Runtime._remoteBase = 'http://localhost:8000/inspector-sources/';
+    if (Runtime.queryParam('debugFrontend'))
+      Runtime._remoteBase += 'debug/';
+  }
+
+  /**
+   * @param {!Runtime.ModuleDescriptor} descriptor
+   */
+  _registerModule(descriptor) {
+    var module = new Runtime.Module(this, descriptor);
+    this._modules.push(module);
+    this._modulesMap[descriptor['name']] = module;
+  }
+
+  /**
+   * @param {string} moduleName
+   * @return {!Promise.<undefined>}
+   */
+  loadModulePromise(moduleName) {
+    return this._modulesMap[moduleName]._loadPromise();
+  }
+
+  /**
+   * @param {!Array.<string>} moduleNames
+   * @return {!Promise.<!Array.<*>>}
+   */
+  _loadAutoStartModules(moduleNames) {
+    var promises = [];
+    for (var i = 0; i < moduleNames.length; ++i)
+      promises.push(this.loadModulePromise(moduleNames[i]));
+    return Promise.all(promises);
+  }
+
+  /**
+   * @param {!Runtime.Extension} extension
+   * @param {?function(function(new:Object)):boolean} predicate
+   * @return {boolean}
+   */
+  _checkExtensionApplicability(extension, predicate) {
+    if (!predicate)
+      return false;
+    var contextTypes = extension.descriptor().contextTypes;
+    if (!contextTypes)
+      return true;
+    for (var i = 0; i < contextTypes.length; ++i) {
+      var contextType = this._resolve(contextTypes[i]);
+      var isMatching = !!contextType && predicate(contextType);
+      if (isMatching)
+        return true;
+    }
+    return false;
+  }
+
+  /**
+   * @param {!Runtime.Extension} extension
+   * @param {?Object} context
+   * @return {boolean}
+   */
+  isExtensionApplicableToContext(extension, context) {
+    if (!context)
+      return true;
+    return this._checkExtensionApplicability(extension, isInstanceOf);
 
     /**
-     * @param {!Runtime.ModuleDescriptor} descriptor
+     * @param {!Function} targetType
+     * @return {boolean}
      */
-    _registerModule: function(descriptor)
-    {
-        var module = new Runtime.Module(this, descriptor);
-        this._modules.push(module);
-        this._modulesMap[descriptor["name"]] = module;
-    },
+    function isInstanceOf(targetType) {
+      return context instanceof targetType;
+    }
+  }
 
-    /**
-     * @param {string} moduleName
-     * @return {!Promise.<undefined>}
-     */
-    loadModulePromise: function(moduleName)
-    {
-        return this._modulesMap[moduleName]._loadPromise();
-    },
+  /**
+   * @param {!Runtime.Extension} extension
+   * @param {!Set.<!Function>=} currentContextTypes
+   * @return {boolean}
+   */
+  isExtensionApplicableToContextTypes(extension, currentContextTypes) {
+    if (!extension.descriptor().contextTypes)
+      return true;
 
-    /**
-     * @param {!Array.<string>} moduleNames
-     * @return {!Promise.<!Array.<*>>}
-     */
-    _loadAutoStartModules: function(moduleNames)
-    {
-        var promises = [];
-        for (var i = 0; i < moduleNames.length; ++i)
-            promises.push(this.loadModulePromise(moduleNames[i]));
-        return Promise.all(promises);
-    },
+    return this._checkExtensionApplicability(extension, currentContextTypes ? isContextTypeKnown : null);
 
     /**
-     * @param {!Runtime.Extension} extension
-     * @param {?function(function(new:Object)):boolean} predicate
+     * @param {!Function} targetType
      * @return {boolean}
      */
-    _checkExtensionApplicability: function(extension, predicate)
-    {
-        if (!predicate)
-            return false;
-        var contextTypes = extension.descriptor().contextTypes;
-        if (!contextTypes)
-            return true;
-        for (var i = 0; i < contextTypes.length; ++i) {
-            var contextType = this._resolve(contextTypes[i]);
-            var isMatching = !!contextType && predicate(contextType);
-            if (isMatching)
-                return true;
-        }
-        return false;
-    },
+    function isContextTypeKnown(targetType) {
+      return currentContextTypes.has(targetType);
+    }
+  }
+
+  /**
+   * @param {*} type
+   * @param {?Object=} context
+   * @param {boolean=} sortByTitle
+   * @return {!Array.<!Runtime.Extension>}
+   */
+  extensions(type, context, sortByTitle) {
+    return this._extensions.filter(filter).sort(sortByTitle ? titleComparator : orderComparator);
 
     /**
      * @param {!Runtime.Extension} extension
-     * @param {?Object} context
      * @return {boolean}
      */
-    isExtensionApplicableToContext: function(extension, context)
-    {
-        if (!context)
-            return true;
-        return this._checkExtensionApplicability(extension, isInstanceOf);
-
-        /**
-         * @param {!Function} targetType
-         * @return {boolean}
-         */
-        function isInstanceOf(targetType)
-        {
-            return context instanceof targetType;
-        }
-    },
+    function filter(extension) {
+      if (extension._type !== type && extension._typeClass() !== type)
+        return false;
+      if (!extension.enabled())
+        return false;
+      return !context || extension.isApplicable(context);
+    }
 
     /**
-     * @param {!Runtime.Extension} extension
-     * @param {!Set.<!Function>=} currentContextTypes
-     * @return {boolean}
+     * @param {!Runtime.Extension} extension1
+     * @param {!Runtime.Extension} extension2
+     * @return {number}
      */
-    isExtensionApplicableToContextTypes: function(extension, currentContextTypes)
-    {
-        if (!extension.descriptor().contextTypes)
-            return true;
-
-        return this._checkExtensionApplicability(extension, currentContextTypes ? isContextTypeKnown : null);
-
-        /**
-         * @param {!Function} targetType
-         * @return {boolean}
-         */
-        function isContextTypeKnown(targetType)
-        {
-            return currentContextTypes.has(targetType);
-        }
-    },
+    function orderComparator(extension1, extension2) {
+      var order1 = extension1.descriptor()['order'] || 0;
+      var order2 = extension2.descriptor()['order'] || 0;
+      return order1 - order2;
+    }
 
     /**
-     * @param {*} type
-     * @param {?Object=} context
-     * @param {boolean=} sortByTitle
-     * @return {!Array.<!Runtime.Extension>}
+     * @param {!Runtime.Extension} extension1
+     * @param {!Runtime.Extension} extension2
+     * @return {number}
      */
-    extensions: function(type, context, sortByTitle)
-    {
-        return this._extensions.filter(filter).sort(sortByTitle ? titleComparator : orderComparator);
-
-        /**
-         * @param {!Runtime.Extension} extension
-         * @return {boolean}
-         */
-        function filter(extension)
-        {
-            if (extension._type !== type && extension._typeClass() !== type)
-                return false;
-            if (!extension.enabled())
-                return false;
-            return !context || extension.isApplicable(context);
-        }
-
-        /**
-         * @param {!Runtime.Extension} extension1
-         * @param {!Runtime.Extension} extension2
-         * @return {number}
-         */
-        function orderComparator(extension1, extension2)
-        {
-            var order1 = extension1.descriptor()["order"] || 0;
-            var order2 = extension2.descriptor()["order"] || 0;
-            return order1 - order2;
-        }
+    function titleComparator(extension1, extension2) {
+      var title1 = extension1.title() || '';
+      var title2 = extension2.title() || '';
+      return title1.localeCompare(title2);
+    }
+  }
+
+  /**
+   * @param {*} type
+   * @param {?Object=} context
+   * @return {?Runtime.Extension}
+   */
+  extension(type, context) {
+    return this.extensions(type, context)[0] || null;
+  }
+
+  /**
+   * @param {*} type
+   * @param {?Object=} context
+   * @return {!Promise.<!Array.<!Object>>}
+   */
+  allInstances(type, context) {
+    return Promise.all(this.extensions(type, context).map(extension => extension.instance()));
+  }
+
+  /**
+   * @return {?function(new:Object)}
+   */
+  _resolve(typeName) {
+    if (!this._cachedTypeClasses[typeName]) {
+      var path = typeName.split('.');
+      var object = self;
+      for (var i = 0; object && (i < path.length); ++i)
+        object = object[path[i]];
+      if (object)
+        this._cachedTypeClasses[typeName] = /** @type function(new:Object) */ (object);
+    }
+    return this._cachedTypeClasses[typeName] || null;
+  }
+
+  /**
+   * @param {!Function} constructorFunction
+   * @return {!Object}
+   */
+  sharedInstance(constructorFunction) {
+    if (Runtime._instanceSymbol in constructorFunction)
+      return constructorFunction[Runtime._instanceSymbol];
+    var instance = new constructorFunction();
+    constructorFunction[Runtime._instanceSymbol] = instance;
+    return instance;
+  }
+}
 
-        /**
-         * @param {!Runtime.Extension} extension1
-         * @param {!Runtime.Extension} extension2
-         * @return {number}
-         */
-        function titleComparator(extension1, extension2)
-        {
-            var title1 = extension1.title() || "";
-            var title2 = extension2.title() || "";
-            return title1.localeCompare(title2);
-        }
-    },
+;
 
-    /**
-     * @param {*} type
-     * @param {?Object=} context
-     * @return {?Runtime.Extension}
-     */
-    extension: function(type, context)
-    {
-        return this.extensions(type, context)[0] || null;
-    },
 
-    /**
-     * @param {*} type
-     * @param {?Object=} context
-     * @return {!Promise.<!Array.<!Object>>}
-     */
-    allInstances: function(type, context)
-    {
-        return Promise.all(this.extensions(type, context).map(extension => extension.instance()));
-    },
+/**
+ * @type {!Object.<string, string>}
+ */
+Runtime._queryParamsObject = {
+  __proto__: null
+};
 
-    /**
-     * @return {?function(new:Object)}
-     */
-    _resolve: function(typeName)
-    {
-        if (!this._cachedTypeClasses[typeName]) {
-            var path = typeName.split(".");
-            var object = self;
-            for (var i = 0; object && (i < path.length); ++i)
-                object = object[path[i]];
-            if (object)
-                this._cachedTypeClasses[typeName] = /** @type function(new:Object) */(object);
-        }
-        return this._cachedTypeClasses[typeName] || null;
-    },
+Runtime._instanceSymbol = Symbol('instance');
+Runtime._extensionSymbol = Symbol('extension');
 
-    /**
-     * @param {!Function} constructorFunction
-     * @return {!Object}
-     */
-    sharedInstance: function(constructorFunction)
-    {
-        if (Runtime._instanceSymbol in constructorFunction)
-            return constructorFunction[Runtime._instanceSymbol];
-        var instance = new constructorFunction();
-        constructorFunction[Runtime._instanceSymbol] = instance;
-        return instance;
-    }
+/**
+ * @type {!Object.<string, string>}
+ */
+Runtime.cachedResources = {
+  __proto__: null
 };
 
+
+/** @type {?function(!MessagePort)} */
+Runtime._sharedWorkerNewPortCallback = null;
+/** @type {!Array<!MessagePort>} */
+Runtime._sharedWorkerConnectedPorts = [];
+
+
+Runtime._console = console;
+Runtime._originalAssert = console.assert;
+
+
+Runtime._platform = '';
+
+
 /**
- * @constructor
+ * @unrestricted
  */
-Runtime.ModuleDescriptor = function()
-{
+Runtime.ModuleDescriptor = class {
+  constructor() {
     /**
      * @type {string}
      */
@@ -625,13 +637,14 @@ Runtime.ModuleDescriptor = function()
      * @type {boolean|undefined}
      */
     this.remote;
+  }
 };
 
 /**
- * @constructor
+ * @unrestricted
  */
-Runtime.ExtensionDescriptor = function()
-{
+Runtime.ExtensionDescriptor = class {
+  constructor() {
     /**
      * @type {string}
      */
@@ -651,15 +664,18 @@ Runtime.ExtensionDescriptor = function()
      * @type {!Array.<string>|undefined}
      */
     this.contextTypes;
+  }
 };
 
 /**
- * @constructor
- * @param {!Runtime} manager
- * @param {!Runtime.ModuleDescriptor} descriptor
+ * @unrestricted
  */
-Runtime.Module = function(manager, descriptor)
-{
+Runtime.Module = class {
+  /**
+   * @param {!Runtime} manager
+   * @param {!Runtime.ModuleDescriptor} descriptor
+   */
+  constructor(manager, descriptor) {
     this._manager = manager;
     this._descriptor = descriptor;
     this._name = descriptor.name;
@@ -670,439 +686,387 @@ Runtime.Module = function(manager, descriptor)
     this._extensionsByClassName = new Map();
     var extensions = /** @type {?Array.<!Runtime.ExtensionDescriptor>} */ (descriptor.extensions);
     for (var i = 0; extensions && i < extensions.length; ++i) {
-        var extension = new Runtime.Extension(this, extensions[i]);
-        this._manager._extensions.push(extension);
-        this._extensions.push(extension);
+      var extension = new Runtime.Extension(this, extensions[i]);
+      this._manager._extensions.push(extension);
+      this._extensions.push(extension);
     }
     this._loadedForTest = false;
-};
-
-Runtime.Module.prototype = {
-    /**
-     * @return {string}
-     */
-    name: function()
-    {
-        return this._name;
-    },
-
-    /**
-     * @return {boolean}
-     */
-    enabled: function()
-    {
-        return Runtime._isDescriptorEnabled(this._descriptor);
-    },
-
-    /**
-     * @param {string} name
-     * @return {string}
-     */
-    resource: function(name)
-    {
-        var fullName = this._name + "/" + name;
-        var content = Runtime.cachedResources[fullName];
-        if (!content)
-            throw new Error(fullName + " not preloaded. Check module.json");
-        return content;
-    },
-
-    /**
-     * @return {!Promise.<undefined>}
-     */
-    _loadPromise: function()
-    {
-        if (!this.enabled())
-            return Promise.reject(new Error("Module " + this._name + " is not enabled"));
-
-        if (this._pendingLoadPromise)
-            return this._pendingLoadPromise;
-
-        var dependencies = this._descriptor.dependencies;
-        var dependencyPromises = [];
-        for (var i = 0; dependencies && i < dependencies.length; ++i)
-            dependencyPromises.push(this._manager._modulesMap[dependencies[i]]._loadPromise());
-
-        this._pendingLoadPromise = Promise.all(dependencyPromises)
-            .then(this._loadResources.bind(this))
-            .then(this._loadScripts.bind(this))
-            .then(() => this._loadedForTest = true);
-
-        return this._pendingLoadPromise;
-    },
-
-    /**
-     * @return {!Promise.<undefined>}
-     * @this {Runtime.Module}
-     */
-    _loadResources: function()
-    {
-        var resources = this._descriptor["resources"];
-        if (!resources || !resources.length)
-            return Promise.resolve();
-        var promises = [];
-        for (var i = 0; i < resources.length; ++i) {
-            var url = this._modularizeURL(resources[i]);
-            promises.push(Runtime.loadResourceIntoCache(url, true));
-        }
-        return Promise.all(promises).then(undefined);
-    },
-
-    /**
-     * @return {!Promise.<undefined>}
-     */
-    _loadScripts: function()
-    {
-        if (!this._descriptor.scripts || !this._descriptor.scripts.length)
-            return Promise.resolve();
-        return Runtime._loadScriptsPromise(this._descriptor.scripts.map(this._modularizeURL, this), this._remoteBase());
-    },
-
-    /**
-     * @param {string} resourceName
-     */
-    _modularizeURL: function(resourceName)
-    {
-        return Runtime.normalizePath(this._name + "/" + resourceName);
-    },
-
-    /**
-     * @return {string|undefined}
-     */
-    _remoteBase: function()
-    {
-        return !Runtime.queryParam("debugFrontend") && this._descriptor.remote && Runtime._remoteBase || undefined;
-    },
-
-    /**
-     * @param {string} value
-     * @return {string}
-     */
-    substituteURL: function(value)
-    {
-        var base = this._remoteBase() || "";
-        return value.replace(/@url\(([^\)]*?)\)/g, convertURL.bind(this));
-
-        function convertURL(match, url)
-        {
-            return base + this._modularizeURL(url);
-        }
+  }
+
+  /**
+   * @return {string}
+   */
+  name() {
+    return this._name;
+  }
+
+  /**
+   * @return {boolean}
+   */
+  enabled() {
+    return Runtime._isDescriptorEnabled(this._descriptor);
+  }
+
+  /**
+   * @param {string} name
+   * @return {string}
+   */
+  resource(name) {
+    var fullName = this._name + '/' + name;
+    var content = Runtime.cachedResources[fullName];
+    if (!content)
+      throw new Error(fullName + ' not preloaded. Check module.json');
+    return content;
+  }
+
+  /**
+   * @return {!Promise.<undefined>}
+   */
+  _loadPromise() {
+    if (!this.enabled())
+      return Promise.reject(new Error('Module ' + this._name + ' is not enabled'));
+
+    if (this._pendingLoadPromise)
+      return this._pendingLoadPromise;
+
+    var dependencies = this._descriptor.dependencies;
+    var dependencyPromises = [];
+    for (var i = 0; dependencies && i < dependencies.length; ++i)
+      dependencyPromises.push(this._manager._modulesMap[dependencies[i]]._loadPromise());
+
+    this._pendingLoadPromise = Promise.all(dependencyPromises)
+                                   .then(this._loadResources.bind(this))
+                                   .then(this._loadScripts.bind(this))
+                                   .then(() => this._loadedForTest = true);
+
+    return this._pendingLoadPromise;
+  }
+
+  /**
+   * @return {!Promise.<undefined>}
+   * @this {Runtime.Module}
+   */
+  _loadResources() {
+    var resources = this._descriptor['resources'];
+    if (!resources || !resources.length)
+      return Promise.resolve();
+    var promises = [];
+    for (var i = 0; i < resources.length; ++i) {
+      var url = this._modularizeURL(resources[i]);
+      promises.push(Runtime.loadResourceIntoCache(url, true));
+    }
+    return Promise.all(promises).then(undefined);
+  }
+
+  /**
+   * @return {!Promise.<undefined>}
+   */
+  _loadScripts() {
+    if (!this._descriptor.scripts || !this._descriptor.scripts.length)
+      return Promise.resolve();
+    return Runtime._loadScriptsPromise(this._descriptor.scripts.map(this._modularizeURL, this), this._remoteBase());
+  }
+
+  /**
+   * @param {string} resourceName
+   */
+  _modularizeURL(resourceName) {
+    return Runtime.normalizePath(this._name + '/' + resourceName);
+  }
+
+  /**
+   * @return {string|undefined}
+   */
+  _remoteBase() {
+    return !Runtime.queryParam('debugFrontend') && this._descriptor.remote && Runtime._remoteBase || undefined;
+  }
+
+  /**
+   * @param {string} value
+   * @return {string}
+   */
+  substituteURL(value) {
+    var base = this._remoteBase() || '';
+    return value.replace(/@url\(([^\)]*?)\)/g, convertURL.bind(this));
+
+    function convertURL(match, url) {
+      return base + this._modularizeURL(url);
     }
+  }
 };
 
-/**
- * @param {!Object} descriptor
- * @return {boolean}
- */
-Runtime._isDescriptorEnabled = function(descriptor)
-{
-    var activatorExperiment = descriptor["experiment"];
-    if (activatorExperiment === "*")
-        return Runtime.experiments.supportEnabled();
-    if (activatorExperiment && activatorExperiment.startsWith("!") && Runtime.experiments.isEnabled(activatorExperiment.substring(1)))
-        return false;
-    if (activatorExperiment && !activatorExperiment.startsWith("!") && !Runtime.experiments.isEnabled(activatorExperiment))
-        return false;
-    var condition = descriptor["condition"];
-    if (condition && !condition.startsWith("!") && !Runtime.queryParam(condition))
-        return false;
-    if (condition && condition.startsWith("!") && Runtime.queryParam(condition.substring(1)))
-        return false;
-    return true;
-};
 
 /**
- * @constructor
- * @param {!Runtime.Module} module
- * @param {!Runtime.ExtensionDescriptor} descriptor
+ * @unrestricted
  */
-Runtime.Extension = function(module, descriptor)
-{
+Runtime.Extension = class {
+  /**
+   * @param {!Runtime.Module} module
+   * @param {!Runtime.ExtensionDescriptor} descriptor
+   */
+  constructor(module, descriptor) {
     this._module = module;
     this._descriptor = descriptor;
 
     this._type = descriptor.type;
-    this._hasTypeClass = this._type.charAt(0) === "@";
+    this._hasTypeClass = this._type.charAt(0) === '@';
 
     /**
      * @type {?string}
      */
     this._className = descriptor.className || null;
     this._factoryName = descriptor.factoryName || null;
-};
-
-Runtime.Extension.prototype = {
-    /**
-     * @return {!Object}
-     */
-    descriptor: function()
-    {
-        return this._descriptor;
-    },
-
-    /**
-     * @return {!Runtime.Module}
-     */
-    module: function()
-    {
-        return this._module;
-    },
-
-    /**
-     * @return {boolean}
-     */
-    enabled: function()
-    {
-        return this._module.enabled() && Runtime._isDescriptorEnabled(this.descriptor());
-    },
-
-    /**
-     * @return {?function(new:Object)}
-     */
-    _typeClass: function()
-    {
-        if (!this._hasTypeClass)
-            return null;
-        return this._module._manager._resolve(this._type.substring(1));
-    },
-
-    /**
-     * @param {?Object} context
-     * @return {boolean}
-     */
-    isApplicable: function(context)
-    {
-        return this._module._manager.isExtensionApplicableToContext(this, context);
-    },
-
-    /**
-     * @return {!Promise.<!Object>}
-     */
-    instance: function()
-    {
-        return this._module._loadPromise().then(this._createInstance.bind(this));
-    },
-
-    /**
-     * @return {!Object}
-     */
-    _createInstance: function()
-    {
-        var className = this._className || this._factoryName;
-        if (!className)
-            throw new Error("Could not instantiate extension with no class");
-        var constructorFunction = self.eval(/** @type {string} */(className));
-        if (!(constructorFunction instanceof Function))
-            throw new Error("Could not instantiate: " + className);
-        if (this._className)
-            return this._module._manager.sharedInstance(constructorFunction);
-        return new constructorFunction(this);
-    },
-
-    /**
-     * @return {string}
-     */
-    title: function()
-    {
-        // FIXME: should be WebInspector.UIString() but runtime is not l10n aware yet.
-        return this._descriptor["title-" + Runtime._platform] || this._descriptor["title"];
-    },
-
-    /**
-     * @param {function(new:Object)} contextType
-     * @return {boolean}
-     */
-    hasContextType: function(contextType)
-    {
-        var contextTypes = this.descriptor().contextTypes;
-        if (!contextTypes)
-            return false;
-        for (var i = 0; i < contextTypes.length; ++i) {
-            if (contextType === this._module._manager._resolve(contextTypes[i]))
-                return true;
-        }
-        return false;
+  }
+
+  /**
+   * @return {!Object}
+   */
+  descriptor() {
+    return this._descriptor;
+  }
+
+  /**
+   * @return {!Runtime.Module}
+   */
+  module() {
+    return this._module;
+  }
+
+  /**
+   * @return {boolean}
+   */
+  enabled() {
+    return this._module.enabled() && Runtime._isDescriptorEnabled(this.descriptor());
+  }
+
+  /**
+   * @return {?function(new:Object)}
+   */
+  _typeClass() {
+    if (!this._hasTypeClass)
+      return null;
+    return this._module._manager._resolve(this._type.substring(1));
+  }
+
+  /**
+   * @param {?Object} context
+   * @return {boolean}
+   */
+  isApplicable(context) {
+    return this._module._manager.isExtensionApplicableToContext(this, context);
+  }
+
+  /**
+   * @return {!Promise.<!Object>}
+   */
+  instance() {
+    return this._module._loadPromise().then(this._createInstance.bind(this));
+  }
+
+  /**
+   * @return {!Object}
+   */
+  _createInstance() {
+    var className = this._className || this._factoryName;
+    if (!className)
+      throw new Error('Could not instantiate extension with no class');
+    var constructorFunction = self.eval(/** @type {string} */ (className));
+    if (!(constructorFunction instanceof Function))
+      throw new Error('Could not instantiate: ' + className);
+    if (this._className)
+      return this._module._manager.sharedInstance(constructorFunction);
+    return new constructorFunction(this);
+  }
+
+  /**
+   * @return {string}
+   */
+  title() {
+    // FIXME: should be WebInspector.UIString() but runtime is not l10n aware yet.
+    return this._descriptor['title-' + Runtime._platform] || this._descriptor['title'];
+  }
+
+  /**
+   * @param {function(new:Object)} contextType
+   * @return {boolean}
+   */
+  hasContextType(contextType) {
+    var contextTypes = this.descriptor().contextTypes;
+    if (!contextTypes)
+      return false;
+    for (var i = 0; i < contextTypes.length; ++i) {
+      if (contextType === this._module._manager._resolve(contextTypes[i]))
+        return true;
     }
+    return false;
+  }
 };
 
 /**
- * @constructor
+ * @unrestricted
  */
-Runtime.ExperimentsSupport = function()
-{
-    this._supportEnabled = Runtime.queryParam("experiments") !== null;
+Runtime.ExperimentsSupport = class {
+  constructor() {
+    this._supportEnabled = Runtime.queryParam('experiments') !== null;
     this._experiments = [];
     this._experimentNames = {};
     this._enabledTransiently = {};
-};
-
-Runtime.ExperimentsSupport.prototype = {
-    /**
-     * @return {!Array.<!Runtime.Experiment>}
-     */
-    allConfigurableExperiments: function()
-    {
-        var result = [];
-        for (var i = 0; i < this._experiments.length; i++) {
-            var experiment = this._experiments[i];
-            if (!this._enabledTransiently[experiment.name])
-                result.push(experiment);
-        }
-        return result;
-    },
-
-    /**
-     * @return {boolean}
-     */
-    supportEnabled: function()
-    {
-        return this._supportEnabled;
-    },
-
-    /**
-     * @param {!Object} value
-     */
-    _setExperimentsSetting: function(value)
-    {
-        if (!self.localStorage)
-            return;
-        self.localStorage["experiments"] = JSON.stringify(value);
-    },
-
-    /**
-     * @param {string} experimentName
-     * @param {string} experimentTitle
-     * @param {boolean=} hidden
-     */
-    register: function(experimentName, experimentTitle, hidden)
-    {
-        Runtime._assert(!this._experimentNames[experimentName], "Duplicate registration of experiment " + experimentName);
-        this._experimentNames[experimentName] = true;
-        this._experiments.push(new Runtime.Experiment(this, experimentName, experimentTitle, !!hidden));
-    },
-
-    /**
-     * @param {string} experimentName
-     * @return {boolean}
-     */
-    isEnabled: function(experimentName)
-    {
-        this._checkExperiment(experimentName);
-
-        if (this._enabledTransiently[experimentName])
-            return true;
-        if (!this.supportEnabled())
-            return false;
-
-        return !!Runtime._experimentsSetting()[experimentName];
-    },
-
-    /**
-     * @param {string} experimentName
-     * @param {boolean} enabled
-     */
-    setEnabled: function(experimentName, enabled)
-    {
-        this._checkExperiment(experimentName);
-        var experimentsSetting = Runtime._experimentsSetting();
-        experimentsSetting[experimentName] = enabled;
-        this._setExperimentsSetting(experimentsSetting);
-    },
-
-    /**
-     * @param {!Array.<string>} experimentNames
-     */
-    setDefaultExperiments: function(experimentNames)
-    {
-        for (var i = 0; i < experimentNames.length; ++i) {
-            this._checkExperiment(experimentNames[i]);
-            this._enabledTransiently[experimentNames[i]] = true;
-        }
-    },
+  }
+
+  /**
+   * @return {!Array.<!Runtime.Experiment>}
+   */
+  allConfigurableExperiments() {
+    var result = [];
+    for (var i = 0; i < this._experiments.length; i++) {
+      var experiment = this._experiments[i];
+      if (!this._enabledTransiently[experiment.name])
+        result.push(experiment);
+    }
+    return result;
+  }
+
+  /**
+   * @return {boolean}
+   */
+  supportEnabled() {
+    return this._supportEnabled;
+  }
+
+  /**
+   * @param {!Object} value
+   */
+  _setExperimentsSetting(value) {
+    if (!self.localStorage)
+      return;
+    self.localStorage['experiments'] = JSON.stringify(value);
+  }
+
+  /**
+   * @param {string} experimentName
+   * @param {string} experimentTitle
+   * @param {boolean=} hidden
+   */
+  register(experimentName, experimentTitle, hidden) {
+    Runtime._assert(!this._experimentNames[experimentName], 'Duplicate registration of experiment ' + experimentName);
+    this._experimentNames[experimentName] = true;
+    this._experiments.push(new Runtime.Experiment(this, experimentName, experimentTitle, !!hidden));
+  }
+
+  /**
+   * @param {string} experimentName
+   * @return {boolean}
+   */
+  isEnabled(experimentName) {
+    this._checkExperiment(experimentName);
+
+    if (this._enabledTransiently[experimentName])
+      return true;
+    if (!this.supportEnabled())
+      return false;
+
+    return !!Runtime._experimentsSetting()[experimentName];
+  }
+
+  /**
+   * @param {string} experimentName
+   * @param {boolean} enabled
+   */
+  setEnabled(experimentName, enabled) {
+    this._checkExperiment(experimentName);
+    var experimentsSetting = Runtime._experimentsSetting();
+    experimentsSetting[experimentName] = enabled;
+    this._setExperimentsSetting(experimentsSetting);
+  }
+
+  /**
+   * @param {!Array.<string>} experimentNames
+   */
+  setDefaultExperiments(experimentNames) {
+    for (var i = 0; i < experimentNames.length; ++i) {
+      this._checkExperiment(experimentNames[i]);
+      this._enabledTransiently[experimentNames[i]] = true;
+    }
+  }
 
-    /**
-     * @param {string} experimentName
-     */
-    enableForTest: function(experimentName)
-    {
-        this._checkExperiment(experimentName);
-        this._enabledTransiently[experimentName] = true;
-    },
-
-    clearForTest: function()
-    {
-        this._experiments = [];
-        this._experimentNames = {};
-        this._enabledTransiently = {};
-    },
-
-    cleanUpStaleExperiments: function()
-    {
-        var experimentsSetting = Runtime._experimentsSetting();
-        var cleanedUpExperimentSetting = {};
-        for (var i = 0; i < this._experiments.length; ++i) {
-            var experimentName = this._experiments[i].name;
-            if (experimentsSetting[experimentName])
-                cleanedUpExperimentSetting[experimentName] = true;
-        }
-        this._setExperimentsSetting(cleanedUpExperimentSetting);
-    },
+  /**
+   * @param {string} experimentName
+   */
+  enableForTest(experimentName) {
+    this._checkExperiment(experimentName);
+    this._enabledTransiently[experimentName] = true;
+  }
 
-    /**
-     * @param {string} experimentName
-     */
-    _checkExperiment: function(experimentName)
-    {
-        Runtime._assert(this._experimentNames[experimentName], "Unknown experiment " + experimentName);
+  clearForTest() {
+    this._experiments = [];
+    this._experimentNames = {};
+    this._enabledTransiently = {};
+  }
+
+  cleanUpStaleExperiments() {
+    var experimentsSetting = Runtime._experimentsSetting();
+    var cleanedUpExperimentSetting = {};
+    for (var i = 0; i < this._experiments.length; ++i) {
+      var experimentName = this._experiments[i].name;
+      if (experimentsSetting[experimentName])
+        cleanedUpExperimentSetting[experimentName] = true;
     }
+    this._setExperimentsSetting(cleanedUpExperimentSetting);
+  }
+
+  /**
+   * @param {string} experimentName
+   */
+  _checkExperiment(experimentName) {
+    Runtime._assert(this._experimentNames[experimentName], 'Unknown experiment ' + experimentName);
+  }
 };
 
 /**
- * @constructor
- * @param {!Runtime.ExperimentsSupport} experiments
- * @param {string} name
- * @param {string} title
- * @param {boolean} hidden
+ * @unrestricted
  */
-Runtime.Experiment = function(experiments, name, title, hidden)
-{
+Runtime.Experiment = class {
+  /**
+   * @param {!Runtime.ExperimentsSupport} experiments
+   * @param {string} name
+   * @param {string} title
+   * @param {boolean} hidden
+   */
+  constructor(experiments, name, title, hidden) {
     this.name = name;
     this.title = title;
     this.hidden = hidden;
     this._experiments = experiments;
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isEnabled() {
+    return this._experiments.isEnabled(this.name);
+  }
+
+  /**
+   * @param {boolean} enabled
+   */
+  setEnabled(enabled) {
+    this._experiments.setEnabled(this.name, enabled);
+  }
 };
 
-Runtime.Experiment.prototype = {
-    /**
-     * @return {boolean}
-     */
-    isEnabled: function()
-    {
-        return this._experiments.isEnabled(this.name);
-    },
-
-    /**
-     * @param {boolean} enabled
-     */
-    setEnabled: function(enabled)
-    {
-        this._experiments.setEnabled(this.name, enabled);
-    }
-};
-
-{(function parseQueryParameters()
 {
+  (function parseQueryParameters() {
     var queryParams = location.search;
     if (!queryParams)
-        return;
-    var params = queryParams.substring(1).split("&");
+      return;
+    var params = queryParams.substring(1).split('&');
     for (var i = 0; i < params.length; ++i) {
-        var pair = params[i].split("=");
-        var name = pair.shift();
-        Runtime._queryParamsObject[name] = pair.join("=");
+      var pair = params[i].split('=');
+      var name = pair.shift();
+      Runtime._queryParamsObject[name] = pair.join('=');
     }
-})();}
-
+  })();
+}
 
 // This must be constructed after the query parameters have been parsed.
 Runtime.experiments = new Runtime.ExperimentsSupport();
@@ -1110,49 +1074,39 @@ Runtime.experiments = new Runtime.ExperimentsSupport();
 /**
  * @type {?string}
  */
-Runtime._remoteBase = Runtime.queryParam("remoteBase");
-{(function validateRemoteBase()
+Runtime._remoteBase = Runtime.queryParam('remoteBase');
 {
+  (function validateRemoteBase() {
     var remoteBaseRegexp = /^https:\/\/chrome-devtools-frontend\.appspot\.com\/serve_file\/@[0-9a-zA-Z]+\/?$/;
     if (Runtime._remoteBase && !remoteBaseRegexp.test(Runtime._remoteBase))
-        Runtime._remoteBase = null;
-})();}
+      Runtime._remoteBase = null;
+  })();
+}
 
-/**
- * @param {string} path
- * @return {string}
- */
-Runtime.resolveSourceURL = function(path)
-{
-    var sourceURL = self.location.href;
-    if (self.location.search)
-        sourceURL = sourceURL.replace(self.location.search, "");
-    sourceURL = sourceURL.substring(0, sourceURL.lastIndexOf("/") + 1) + path;
-    return "\n/*# sourceURL=" + sourceURL + " */";
-};
 
 /**
  * @interface
  */
-function ServicePort() { }
+function ServicePort() {
+}
 
 ServicePort.prototype = {
-    /**
-     * @param {function(string)} messageHandler
-     * @param {function(string)} closeHandler
-     */
-    setHandlers: function(messageHandler, closeHandler) { },
-
-    /**
-     * @param {string} message
-     * @return {!Promise<boolean>}
-     */
-    send: function(message) { },
-
-    /**
-     * @return {!Promise<boolean>}
-     */
-    close: function() { }
+  /**
+   * @param {function(string)} messageHandler
+   * @param {function(string)} closeHandler
+   */
+  setHandlers: function(messageHandler, closeHandler) {},
+
+  /**
+   * @param {string} message
+   * @return {!Promise<boolean>}
+   */
+  send: function(message) {},
+
+  /**
+   * @return {!Promise<boolean>}
+   */
+  close: function() {}
 };
 
 /** @type {!Runtime} */