Spec update: restrict the protocol setter for "file"

Follows whatwg/url#269.

scripts/get-latest-platform-tests.js

@@ -14,7 +14,7 @@ const request = require("request");
 // 1. Go to https://github.com/w3c/web-platform-tests/tree/master/url
 // 2. Press "y" on your keyboard to get a permalink
 // 3. Copy the commit hash
-const commitHash = "e8aa61d80e3971489ace4355ee970d30c09b615e";
+const commitHash = "17966a23f1a561e5e0cd86232b3655c47240c9d5";
 
 const sourceURL = `https://raw.githubusercontent.com/w3c/web-platform-tests/${commitHash}/url/urltestdata.json`;
 const setterSourceURL = `https://raw.githubusercontent.com/w3c/web-platform-tests/${commitHash}/url/setters_tests.json`;

src/url-state-machine.js

@@ -598,6 +598,14 @@ URLStateMachine.prototype["parse scheme"] = function parseScheme(c, cStr) {
       if (!isSpecial(this.url) && isSpecialScheme(this.buffer)) {
         return false;
       }
+
+      if ((includesCredentials(this.url) || this.url.port !== null) && this.buffer === "file") {
+        return false;
+      }
+
+      if (this.url.scheme === "file" && (this.url.host === "" || this.url.host === null)) {
+        return false;
+      }
     }
     this.url.scheme = this.buffer;
     this.buffer = "";