Add flag to override Effective Connection Type

net/nqe/network_quality_estimator_params.h

Index: net/nqe/network_quality_estimator_params.h
diff --git a/net/nqe/network_quality_estimator_params.h b/net/nqe/network_quality_estimator_params.h
index 9996735c4902a6625619bf53b66c494f5b3c0877..21e93e90a0869a74a1180538043c94615ca86885 100644
--- a/net/nqe/network_quality_estimator_params.h
+++ b/net/nqe/network_quality_estimator_params.h
@@ -10,12 +10,17 @@
 
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
+#include "net/base/net_export.h"
 #include "net/base/network_change_notifier.h"
 #include "net/nqe/effective_connection_type.h"
 #include "net/nqe/network_quality.h"
 
 namespace net {
 
+// Forces NQE to return a specific effective connection type. Set using the
+// |params| provided to the NetworkQualityEstimatorParams constructor.
+NET_EXPORT extern const char kForceEffectiveConnectionType[];
+
 namespace nqe {
 
 namespace internal {