Mark ECT as ambiguous if there is a change in the connection type.

components/metrics/net/network_metrics_provider.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/metrics/net/network_metrics_provider.h"
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
@@ skipping 207 matching lines @@
   // connection type is refreshed in ProvideSystemProfileMetrics() each time a
   // new UMA logging window begins, so users who genuinely transition to offline
   // mode for an extended duration will still be at least partially represented
   // in the metrics logs.
   if (type == net::NetworkChangeNotifier::CONNECTION_NONE)
     return;
 
   if (type != connection_type_ &&
       connection_type_ != net::NetworkChangeNotifier::CONNECTION_NONE) {
     connection_type_is_ambiguous_ = true;
+    effective_connection_type_is_ambiguous_ = true;
   }
   connection_type_ = type;
 
   ProbeWifiPHYLayerProtocol();
 }
 
 SystemProfileProto::Network::ConnectionType
 NetworkMetricsProvider::GetConnectionType() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   switch (connection_type_) {
@@ skipping 191 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   if (effective_connection_type_ != type &&
       type != net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN &&
       effective_connection_type_ != net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN) {
     effective_connection_type_is_ambiguous_ = true;
   }
   effective_connection_type_ = type;
 }
 
 }  // namespace metrics