DevTools: sanitize audits filename before download

BUG=GoogleChrome/lighthouse#5633

Change-Id: I58fc3d6541bfab6305936f5e5f5034b4bcfdaae1
Reviewed-on: https://chromium-review.googlesource.com/1132136
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Patrick Hulce <phulce@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#573937}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: b9e6f065c035bfd0487695bd981cdf57108e5ceb

front_end/audits2/Audits2ReportSelector.js

@@ -136,9 +136,10 @@ Audits2.ReportSelector.Item = class {
   }
 
   download() {
-    const url = new Common.ParsedURL(this._lighthouseResult.finalUrl).domain();
+    const domain = new Common.ParsedURL(this._lighthouseResult.finalUrl).domain();
+    const sanitizedDomain = domain.replace(/[^a-z0-9.-]+/gi, '_');
     const timestamp = this._lighthouseResult.fetchTime;
-    const fileName = `${url}-${new Date(timestamp).toISO8601Compact()}.json`;
+    const fileName = `${sanitizedDomain}-${new Date(timestamp).toISO8601Compact()}.json`;
     Workspace.fileManager.save(fileName, JSON.stringify(this._lighthouseResult), true);
   }
 };