Don't run platform diagnostics tool on invalid URLs from the renderer.

chrome/browser/net/net_error_tab_helper.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/net/net_error_tab_helper.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 244 matching lines @@
   rfh->Send(new ChromeViewMsg_NetErrorInfo(rfh->GetRoutingID(),
                                            dns_probe_status_));
 
   if (!dns_probe_status_snoop_callback_.is_null())
     dns_probe_status_snoop_callback_.Run(dns_probe_status_);
 }
 
 void NetErrorTabHelper::RunNetworkDiagnostics(const GURL& url) {
   // Only run diagnostics on HTTP or HTTPS URLs.  Shouldn't receive URLs with
   // any other schemes, but the renderer is not trusted.
-  if (!url.SchemeIsHTTPOrHTTPS())
+  if (!url.is_valid() || !url.SchemeIsHTTPOrHTTPS())
     return;
   // Sanitize URL prior to running diagnostics on it.
   RunNetworkDiagnosticsHelper(url.GetOrigin());
 }
 
 void NetErrorTabHelper::RunNetworkDiagnosticsHelper(
     const GURL& sanitized_url) {
   ShowNetworkDiagnosticsDialog(web_contents(), sanitized_url);
 }
 
 }  // namespace chrome_browser_net