[Cronet] Ignore Certificate Transparency to avoid CT log expiration.

components/cronet/android/cronet_url_request_context_adapter.cc

Index: components/cronet/android/cronet_url_request_context_adapter.cc
diff --git a/components/cronet/android/cronet_url_request_context_adapter.cc b/components/cronet/android/cronet_url_request_context_adapter.cc
index 112762c17d925b68581eb5669df826b42e3b0f64..c5577784bbf6f44118e3d3b158177b946f1b7bc4 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.cc
+++ b/components/cronet/android/cronet_url_request_context_adapter.cc
@@ -33,6 +33,7 @@
 #include "base/values.h"
 #include "components/cronet/android/cert/cert_verifier_cache_serializer.h"
 #include "components/cronet/android/cert/proto/cert_verification.pb.h"
+#include "components/cronet/ct_ignores.h"
 #include "components/cronet/histogram_manager.h"
 #include "components/cronet/url_request_context_config.h"
 #include "components/prefs/pref_change_registrar.h"
@@ -605,6 +606,11 @@ void CronetURLRequestContextAdapter::InitializeOnNetworkThread(
   // of HPKP by specifying transport_security_persister_path in the future.
   context_builder.set_transport_security_persister_path(base::FilePath());
 
+  // Ignore Certificate Transparency to avoid log expiration (crbug.com/663883).
+  context_builder.set_ct_verifier(base::MakeUnique<IgnoresCTVerifier>());
+  context_builder.set_ct_policy_enforcer(
+      base::MakeUnique<IgnoresCTPolicyEnforcer>());
+
   // Disable net::CookieStore and net::ChannelIDService.
   context_builder.SetCookieAndChannelIdStores(nullptr, nullptr);