Fixed a glitch in the ComponentCloudPolicyUpdater where a protobuf field was read before being vali…

chrome/browser/policy/component_cloud_policy_updater.cc

Index: chrome/browser/policy/component_cloud_policy_updater.cc
diff --git a/chrome/browser/policy/component_cloud_policy_updater.cc b/chrome/browser/policy/component_cloud_policy_updater.cc
index 601b345d8de98ab4a4b8c7fcdea7dc476d57cb94..1ce3f275429949b72c86f12b543789851ead7ce5 100644
--- a/chrome/browser/policy/component_cloud_policy_updater.cc
+++ b/chrome/browser/policy/component_cloud_policy_updater.cc
@@ -351,8 +351,10 @@ void ComponentCloudPolicyUpdater::UpdateExternalPolicy(
   }
 
   // Maybe the data for this hash has already been downloaded and cached.
-  if (data.secure_hash() == store_->GetCachedHash(ns))
+  if (data.has_secure_hash() &&
+      data.secure_hash() == store_->GetCachedHash(ns)) {
     return;
+  }
 
   // TODO(joaodasilva): implement the other two auth methods.
   if (data.download_auth_method() != em::ExternalPolicyData::NONE)