Syntax errors in three network traffic annotations corrected.

extensions/browser/updater/extension_downloader.cc

Index: extensions/browser/updater/extension_downloader.cc
diff --git a/extensions/browser/updater/extension_downloader.cc b/extensions/browser/updater/extension_downloader.cc
index e7630ac00d5bfef5ce7a37fcf841b0706111b875..d18b580d620785ecb6d384bc2a5e7446a99f7bda 100644
--- a/extensions/browser/updater/extension_downloader.cc
+++ b/extensions/browser/updater/extension_downloader.cc
@@ -506,7 +506,9 @@ void ExtensionDownloader::CreateManifestFetcher() {
           chrome_policy {
             ExtensionInstallBlacklist {
               policy_options {mode: MANDATORY}
-              ExtensionInstallBlacklist: '*'
+              ExtensionInstallBlacklist: {
+                entries: '*'
+              }
             }
           }
         })");
@@ -833,7 +835,9 @@ void ExtensionDownloader::CreateExtensionFetcher() {
           chrome_policy {
             ExtensionInstallBlacklist {
               policy_options {mode: MANDATORY}
-              ExtensionInstallBlacklist: '*'
+              ExtensionInstallBlacklist: {
+                entries: '*'
+              }
             }
           }
         })");