Syntax errors in three network traffic annotations corrected.

chrome/browser/extensions/install_signer.cc

Index: chrome/browser/extensions/install_signer.cc
diff --git a/chrome/browser/extensions/install_signer.cc b/chrome/browser/extensions/install_signer.cc
index 27117256902062969b252dad76cc30e8b59ce2cc..90bd7a08fb4257f80d2f089129377f6c898958c9 100644
--- a/chrome/browser/extensions/install_signer.cc
+++ b/chrome/browser/extensions/install_signer.cc
@@ -399,7 +399,9 @@ void InstallSigner::GetSignature(const SignatureCallback& callback) {
           chrome_policy {
             ExtensionInstallBlacklist {
               policy_options {mode: MANDATORY}
-              ExtensionInstallBlacklist: '*'
+              ExtensionInstallBlacklist: {
+                entries: '*'
+              }
             }
           }
         })");