[Cronet] Add API to set DNS cache entry

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 b90874ab8dc82245e6caffd1cd4ed9ddbe46d612..e02586d5afe07d70bf8396543762176fba87b874 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.h
+++ b/components/cronet/android/cronet_url_request_context_adapter.h
@@ -18,6 +18,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "components/prefs/json_pref_store.h"
+#include "net/base/address_list.h"
 #include "net/nqe/effective_connection_type.h"
 #include "net/nqe/network_quality_estimator.h"
 #include "net/nqe/network_quality_observation_source.h"
@@ -133,6 +134,13 @@ class CronetURLRequestContextAdapter
       const base::android::JavaParamRef<jobject>& jcaller,
       bool should);
 
+  // Put an entry in the HostCache for a particular host.
+  void PutHostCache(JNIEnv* env,
+                    const base::android::JavaParamRef<jobject>& jcaller,
+                    const base::android::JavaParamRef<jstring>& jhostname,
+                    const base::android::JavaParamRef<jobjectArray>& jaddresses,
+                    jint jseconds_to_live);
+
  private:
   friend class TestUtil;
 
@@ -167,6 +175,9 @@ class CronetURLRequestContextAdapter
 
   void ProvideRTTObservationsOnNetworkThread(bool should);
   void ProvideThroughputObservationsOnNetworkThread(bool should);
+  void PutHostCacheOnNetworkThread(std::string hostname,
+                                   net::AddressList address_list,
+                                   base::TimeDelta ttl);
 
   // net::NetworkQualityEstimator::EffectiveConnectionTypeObserver
   // implementation.