MD Settings: Convert all browser proxies to use ES6 class syntax.

chrome/browser/resources/settings/appearance_page/appearance_browser_proxy.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('settings', function() {
   /** @interface */
-  function AppearanceBrowserProxy() {}
-
-  AppearanceBrowserProxy.prototype = {
+  class AppearanceBrowserProxy {
     /** @return {!Promise<number>} */
-    getDefaultZoom: assertNotReached,
+    getDefaultZoom() {}
 
     /**
      * @param {string} themeId
      * @return {!Promise<!chrome.management.ExtensionInfo>} Theme info.
      */
-    getThemeInfo: assertNotReached,
+    getThemeInfo(themeId) {}
 
     /** @return {boolean} Whether the current profile is supervised. */
-    isSupervised: assertNotReached,
+    isSupervised() {}
 
     // <if expr="chromeos">
-    openWallpaperManager: assertNotReached,
+    openWallpaperManager() {}
+
     // </if>
 
-    useDefaultTheme: assertNotReached,
+    useDefaultTheme() {}
 
     // <if expr="is_linux and not chromeos">
-    useSystemTheme: assertNotReached,
+    useSystemTheme() {}
+
     // </if>
 
     /**
      * @param {string} url The url of which to check validity.
      * @return {!Promise<boolean>}
      */
-    validateStartupPage: assertNotReached,
-  };
+    validateStartupPage(url) {}
+  }
 
   /**
    * @implements {settings.AppearanceBrowserProxy}
-   * @constructor
    */
-  function AppearanceBrowserProxyImpl() {}
+  class AppearanceBrowserProxyImpl {
+    /** @override */
+    getDefaultZoom() {
+      return new Promise(function(resolve) {
+        chrome.settingsPrivate.getDefaultZoom(resolve);
+      });
+    }
+
+    /** @override */
+    getThemeInfo(themeId) {
+      return new Promise(function(resolve) {
+        chrome.management.get(themeId, resolve);
+      });
+    }
+
+    /** @override */
+    isSupervised() {
+      return loadTimeData.getBoolean('isSupervised');
+    }
+
+    // <if expr="chromeos">
+    /** @override */
+    openWallpaperManager() {
+      chrome.send('openWallpaperManager');
+    }
+
+    // </if>
+
+    /** @override */
+    useDefaultTheme() {
+      chrome.send('useDefaultTheme');
+    }
+
+    // <if expr="is_linux and not chromeos">
+    /** @override */
+    useSystemTheme() {
+      chrome.send('useSystemTheme');
+    }
+
+    // </if>
+
+    /** @override */
+    validateStartupPage(url) {
+      return cr.sendWithPromise('validateStartupPage', url);
+    }
+  }
 
   cr.addSingletonGetter(AppearanceBrowserProxyImpl);
 
-  AppearanceBrowserProxyImpl.prototype = {
-    /** @override */
-    getDefaultZoom: function() {
-      return new Promise(function(resolve) {
-        chrome.settingsPrivate.getDefaultZoom(resolve);
-      });
-    },
-
-    /** @override */
-    getThemeInfo: function(themeId) {
-      return new Promise(function(resolve) {
-        chrome.management.get(themeId, resolve);
-      });
-    },
-
-    /** @override */
-    isSupervised: function() {
-      return loadTimeData.getBoolean('isSupervised');
-    },
-
-    // <if expr="chromeos">
-    /** @override */
-    openWallpaperManager: function() {
-      chrome.send('openWallpaperManager');
-    },
-    // </if>
-
-    /** @override */
-    useDefaultTheme: function() {
-      chrome.send('useDefaultTheme');
-    },
-
-    // <if expr="is_linux and not chromeos">
-    /** @override */
-    useSystemTheme: function() {
-      chrome.send('useSystemTheme');
-    },
-    // </if>
-
-    /** @override */
-    validateStartupPage: function(url) {
-      return cr.sendWithPromise('validateStartupPage', url);
-    },
-  };
-
   return {
     AppearanceBrowserProxy: AppearanceBrowserProxy,
     AppearanceBrowserProxyImpl: AppearanceBrowserProxyImpl,
   };
 });