Revert of Expose effective connection type to Cronet

components/cronet/android/cronet_url_request_context_adapter.h

Index: components/cronet/android/cronet_url_request_context_adapter.h
diff --git a/components/cronet/android/cronet_url_request_context_adapter.h b/components/cronet/android/cronet_url_request_context_adapter.h
index 329b413160b16a926c74e58d7ea0e4bdb3b219c2..42626a3f66a82d608a51f285273bdb435aaf35a4 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.h
+++ b/components/cronet/android/cronet_url_request_context_adapter.h
@@ -18,7 +18,6 @@
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "components/prefs/json_pref_store.h"
-#include "net/nqe/effective_connection_type.h"
 #include "net/nqe/network_quality_estimator.h"
 #include "net/nqe/network_quality_observation_source.h"
 
@@ -50,8 +49,7 @@
 
 // Adapter between Java CronetUrlRequestContext and net::URLRequestContext.
 class CronetURLRequestContextAdapter
-    : public net::NetworkQualityEstimator::EffectiveConnectionTypeObserver,
-      public net::NetworkQualityEstimator::RTTObserver,
+    : public net::NetworkQualityEstimator::RTTObserver,
       public net::NetworkQualityEstimator::ThroughputObserver {
  public:
   explicit CronetURLRequestContextAdapter(
@@ -150,11 +148,6 @@
 
   void ProvideRTTObservationsOnNetworkThread(bool should);
   void ProvideThroughputObservationsOnNetworkThread(bool should);
-
-  // net::NetworkQualityEstimator::EffectiveConnectionTypeObserver
-  // implementation.
-  void OnEffectiveConnectionTypeChanged(
-      net::EffectiveConnectionType effective_connection_type) override;
 
   // net::NetworkQualityEstimator::RTTObserver implementation.
   void OnRTTObservation(int32_t rtt_ms,