Check that all preloaded hostnames are in canonicalized form.

net/tools/transport_security_state_generator/input_file_parsers.cc

 // Copyright 2017 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 "net/tools/transport_security_state_generator/input_file_parsers.h"
 
 #include <sstream>
 #include <vector>
 
 #include "base/json/json_reader.h"
@@ skipping 285 matching lines @@
 
     std::unique_ptr<TransportSecurityStateEntry> entry(
         new TransportSecurityStateEntry());
 
     if (!parsed->GetString("name", &entry->hostname)) {
       LOG(ERROR) << "Could not extract the hostname for entry "
                  << base::SizeTToString(i) << " from the input JSON";
       return false;
     }
 
+    if (entry->hostname.empty()) {
+      LOG(ERROR) << "The hostname for entry " << base::SizeTToString(i)
+                 << " is empty";
+      return false;
+    }
+
     parsed->GetBoolean("include_subdomains", &entry->include_subdomains);
     std::string mode;
     parsed->GetString("mode", &mode);
     entry->force_https = (mode == "force-https");
     parsed->GetBoolean("include_subdomains_for_pinning",
                        &entry->hpkp_include_subdomains);
     parsed->GetString("pins", &entry->pinset);
     parsed->GetBoolean("expect_ct", &entry->expect_ct);
     parsed->GetString("expect_ct_report_uri", &entry->expect_ct_report_uri);
     parsed->GetBoolean("expect_staple", &entry->expect_staple);
@@ skipping 52 matching lines @@
 
     pinsets->RegisterPinset(std::move(pinset));
   }
 
   return true;
 }
 
 }  // namespace transport_security_state
 
 }  // namespace net