Syntax errors in three network traffic annotations corrected.

chrome/browser/extensions/install_signer.cc

 // Copyright 2013 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/extensions/install_signer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 381 matching lines @@
         }
         policy {
           cookies_allowed: true
           cookies_store: "user"
           setting:
             "This feature cannot be disabled, but it is only activated if "
             "extensions are installed."
           chrome_policy {
             ExtensionInstallBlacklist {
               policy_options {mode: MANDATORY}
-              ExtensionInstallBlacklist: '*'
+              ExtensionInstallBlacklist: {
+                entries: '*'
+              }
             }
           }
         })");
   url_fetcher_ = net::URLFetcher::Create(GetBackendUrl(), net::URLFetcher::POST,
                                          delegate_.get(), traffic_annotation);
   url_fetcher_->SetRequestContext(context_getter_);
 
   // The request protocol is JSON of the form:
   // {
   //   "protocol_version": "1",
@@ skipping 122 matching lines @@
     if (!verified)
       result.reset();
   }
 
   if (!callback_.is_null())
     callback_.Run(std::move(result));
 }
 
 
 }  // namespace extensions