Updating JSCS and fixing linting errors.

Also removing custom JSCS rule for Closure.

.jscsrc

@@ -1,16 +1,13 @@
 {
   "preset": "google",
-  "esnext": true,
   "disallowSpacesInAnonymousFunctionExpression": null,
   "validateLineBreaks": "LF",
   "validateIndentation": 2,
   "excludeFiles": ["node_modules/**"],
   "maximumLineLength": 130,
   "validateQuoteMarks": "'",
   "requireDotNotation": false,
-  "requireCamelCaseOrUpperCaseIdentifiers": null,
-  "additionalRules": ["./utils/jscs-rules/*.js", "../utils/jscs-rules/*.js"],
-  "closureCamelCase": true,
+  "requireCamelCaseOrUpperCaseIdentifiers": {"allowedPrefixes": ["opt_"]},
   "jsDoc": {
     "checkAnnotations": {
       "preset": "closurecompiler",

gulpfile.babel.js

@@ -17,7 +17,7 @@
  *
  */
 
- // jscs:disable jsDoc
+// jscs:disable jsDoc
 
 'use strict';
 
@@ -219,12 +219,12 @@ gulp.task('closure', () => {
       compilerPath: 'node_modules/google-closure-compiler/compiler.jar',
       fileName: 'material.closure.min.js',
       compilerFlags: {
-        // jscs:disable closureCamelCase
+        // jscs:disable requireCamelCaseOrUpperCaseIdentifiers
         compilation_level: 'ADVANCED_OPTIMIZATIONS',
         language_in: 'ECMASCRIPT6_STRICT',
         language_out: 'ECMASCRIPT5_STRICT',
         warning_level: 'VERBOSE'
-        // jscs:enable closureCamelCase
+        // jscs:enable requireCamelCaseOrUpperCaseIdentifiers
       }
     }))
     .pipe(gulp.dest('./dist'));

package.json

@@ -33,7 +33,7 @@
     "gulp-if": "^2.0.0",
     "gulp-iife": "^0.3.0",
     "gulp-imagemin": "^3.1.0",
-    "gulp-jscs": "^3.0.1",
+    "gulp-jscs": "^4.0.0",
     "gulp-jshint": "^2.0.4",
     "gulp-load-plugins": "^1.3.0",
     "gulp-marked": "^1.0.0",

src/third_party/rAF.js

@@ -9,42 +9,42 @@
 // MIT license
 
 (function() {
-'use strict';
+  'use strict';
 
-if (!Date.now) {
-  /**
-   * Date.now polyfill.
-   * @return {number} the current Date
-   */
-  Date.now = function() { return new Date().getTime(); };
-  Date['now'] = Date.now;
-}
+  if (!Date.now) {
+    /**
+     * Date.now polyfill.
+     * @return {number} the current Date
+     */
+    Date.now = function() { return new Date().getTime(); };
+    Date['now'] = Date.now;
+  }
 
-var vendors = ['webkit', 'moz'];
-for (var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
-  var vp = vendors[i];
-  window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
-  window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
-      window[vp + 'CancelRequestAnimationFrame']);
-  window['requestAnimationFrame'] = window.requestAnimationFrame;
-  window['cancelAnimationFrame'] = window.cancelAnimationFrame;
-}
+  var vendors = ['webkit', 'moz'];
+  for (var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
+    var vp = vendors[i];
+    window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
+    window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
+        window[vp + 'CancelRequestAnimationFrame']);
+    window['requestAnimationFrame'] = window.requestAnimationFrame;
+    window['cancelAnimationFrame'] = window.cancelAnimationFrame;
+  }
 
-if (/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || !window.requestAnimationFrame || !window.cancelAnimationFrame) {
-  var lastTime = 0;
-  /**
-   * requestAnimationFrame polyfill.
-   * @param  {!Function} callback the callback function.
-   */
-  window.requestAnimationFrame = function(callback) {
-    var now = Date.now();
-    var nextTime = Math.max(lastTime + 16, now);
-    return setTimeout(function() { callback(lastTime = nextTime); },
-                      nextTime - now);
-  };
-  window.cancelAnimationFrame = clearTimeout;
-  window['requestAnimationFrame'] = window.requestAnimationFrame;
-  window['cancelAnimationFrame'] = window.cancelAnimationFrame;
-}
+  if (/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || !window.requestAnimationFrame || !window.cancelAnimationFrame) {
+    var lastTime = 0;
+    /**
+     * requestAnimationFrame polyfill.
+     * @param  {!Function} callback the callback function.
+     */
+    window.requestAnimationFrame = function(callback) {
+      var now = Date.now();
+      var nextTime = Math.max(lastTime + 16, now);
+      return setTimeout(function() { callback(lastTime = nextTime); },
+                        nextTime - now);
+    };
+    window.cancelAnimationFrame = clearTimeout;
+    window['requestAnimationFrame'] = window.requestAnimationFrame;
+    window['cancelAnimationFrame'] = window.cancelAnimationFrame;
+  }
 
 })();