[DevTools] Disable 'clear site data' button on error page

In Application's Clear Storage panel, when the current site is invalid,
e.g. localhost:5000 (no server running there), the 'clear site data'
button should be deactivated, and the subtitle for this panel should
not display the security origin address.

Component 'ParsedURL' has the ability to tell whether the url is valid.

Bug: 915703, 919857
Change-Id: I41f6079bbef299d284b36815d3888e3cec1e0050
Reviewed-on: https://chromium-review.googlesource.com/c/1447317Reviewed-by: Joel Einbinder <einbinder@chromium.org>
Commit-Queue: Haihong Li (Harley) <hhli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628440}

third_party/blink/renderer/devtools/front_end/resources/ClearStorageView.js

@@ -117,7 +117,14 @@ Resources.ClearStorageView = class extends UI.ThrottledWidget {
    * @param {string} url
    */
   _updateOrigin(url) {
-    this._securityOrigin = new Common.ParsedURL(url).securityOrigin();
+    const parsedURL = new Common.ParsedURL(url);
+    if (!parsedURL.isValid) {
+      this._clearButton.disabled = true;
+      this._securityOrigin = '';
+    } else {
+      this._clearButton.disabled = false;
+      this._securityOrigin = parsedURL.securityOrigin();
+    }
     this._reportView.setSubtitle(this._securityOrigin);
     this.doUpdate();
   }

third_party/blink/web_tests/http/tests/devtools/components/parsed-url-expected.txt

@@ -44,6 +44,28 @@ Parsing url: http://foo@example.com/foo/bar/baz.html?queryParam1=value1&queryPar
   fragment: fragmentWith/Many//Slashes
   folderPathComponents: /foo/bar
   lastPathComponent: baz.html
+Parsing url: ://
+  isValid: false
+  scheme: 
+  user: 
+  host: 
+  port: 
+  path: ://
+  queryParams: 
+  fragment: 
+  folderPathComponents: :/
+  lastPathComponent: 
+Parsing url: 
+  isValid: false
+  scheme: 
+  user: 
+  host: 
+  port: 
+  path: 
+  queryParams: 
+  fragment: 
+  folderPathComponents: 
+  lastPathComponent: 
 Parsing url: http://[::]/?queryParam1=value1&queryParam2=value2#fragmentWith/Many//Slashes
   isValid: true
   scheme: http

third_party/blink/web_tests/http/tests/devtools/components/parsed-url.js

@@ -11,6 +11,8 @@
       'http://user42:Alina-!$&@example.com/foo/bar.html?queryParam1=value1&queryParam2=value2#fragmentWith/Many//Slashes');
   parseAndDumpURL(
       'http://foo@example.com/foo/bar/baz.html?queryParam1=value1&queryParam2=value2#fragmentWith/Many//Slashes');
+  parseAndDumpURL('://');
+  parseAndDumpURL('');
 
   // support IPv6 localhost
   parseAndDumpURL('http://[::]/?queryParam1=value1&queryParam2=value2#fragmentWith/Many//Slashes');