[Cronet] Add API to set DNS cache entry

components/cronet/android/cronet_url_request_context_adapter.h

 // 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.
 
 #ifndef COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_CONTEXT_ADAPTER_H_
 #define COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_CONTEXT_ADAPTER_H_
 
 #include <jni.h>
 #include <stdint.h>
 
 #include <memory>
 #include <queue>
 #include <string>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #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"
 
 class PrefService;
 
 namespace base {
 class SingleThreadTaskRunner;
 class TimeTicks;
 }  // namespace base
@@ skipping 95 matching lines @@
   // provided by the network quality estimator.
   void ProvideRTTObservations(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& jcaller,
       bool should);
   void ProvideThroughputObservations(
       JNIEnv* env,
       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;
 
   // Initializes |context_| on the Network thread.
   void InitializeOnNetworkThread(
       std::unique_ptr<URLRequestContextConfig> config,
       const base::android::ScopedJavaGlobalRef<jobject>&
           jcronet_url_request_context);
 
   // Runs a task that might depend on the context being initialized.
@@ skipping 14 matching lines @@
   // to use smaller responses when estimating throughput, and to disable the
   // device offline checks when computing the effective connection type or when
   // writing the prefs. This should only be used for testing.
   void ConfigureNetworkQualityEstimatorOnNetworkThreadForTesting(
       bool use_local_host_requests,
       bool use_smaller_responses,
       bool disable_offline_check);
 
   void ProvideRTTObservationsOnNetworkThread(bool should);
   void ProvideThroughputObservationsOnNetworkThread(bool should);
+  void PutHostCacheOnNetworkThread(std::string hostname,
+                                   net::AddressList address_list,
+                                   base::TimeDelta ttl);
 
   // net::NetworkQualityEstimator::EffectiveConnectionTypeObserver
   // implementation.
   void OnEffectiveConnectionTypeChanged(
       net::EffectiveConnectionType effective_connection_type) override;
 
   // net::NetworkQualityEstimator::RTTAndThroughputEstimatesObserver
   // implementation.
   void OnRTTOrThroughputEstimatesComputed(
       base::TimeDelta http_rtt,
@@ skipping 70 matching lines @@
 
   // Java object that owns this CronetURLRequestContextAdapter.
   base::android::ScopedJavaGlobalRef<jobject> jcronet_url_request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(CronetURLRequestContextAdapter);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_CONTEXT_ADAPTER_H_