Inject the prodid for the extensions and component updaters.

components/update_client/test_configurator.cc

Index: components/update_client/test_configurator.cc
diff --git a/components/update_client/test_configurator.cc b/components/update_client/test_configurator.cc
index eb17165ab6a3295f1ff4c662197dfa40e01fa593..93fe32894e3609bf098702f771252b3ba8ac09bc 100644
--- a/components/update_client/test_configurator.cc
+++ b/components/update_client/test_configurator.cc
@@ -70,6 +70,10 @@ std::vector<GURL> TestConfigurator::PingUrl() const {
   return UpdateUrl();
 }
 
+std::string TestConfigurator::GetProdId() const {
+  return "fake_prodid";
+}
+
 base::Version TestConfigurator::GetBrowserVersion() const {
   // Needs to be larger than the required version in tested component manifests.
   return base::Version("30.0");