[Cronet] Add API to set DNS cache entry

components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java

 // 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.
 
 package org.chromium.net.impl;
 
 import android.os.ConditionVariable;
 import android.os.Process;
 
 import org.chromium.base.Log;
 import org.chromium.base.ObserverList;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.annotations.NativeClassQualifiedName;
 import org.chromium.base.annotations.UsedByReflection;
 import org.chromium.net.BidirectionalStream;
 import org.chromium.net.EffectiveConnectionType;
 import org.chromium.net.ExperimentalBidirectionalStream;
 import org.chromium.net.NetworkQualityRttListener;
 import org.chromium.net.NetworkQualityThroughputListener;
 import org.chromium.net.RequestFinishedInfo;
 import org.chromium.net.RttThroughputValues;
 import org.chromium.net.UrlRequest;
 import org.chromium.net.urlconnection.CronetHttpURLConnection;
 import org.chromium.net.urlconnection.CronetURLStreamHandlerFactory;
 
+import java.net.InetAddress;
 import java.net.Proxy;
 import java.net.URL;
 import java.net.URLConnection;
 import java.net.URLStreamHandlerFactory;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Executor;
@@ skipping 453 matching lines @@
             return new CronetHttpURLConnection(url, this);
         }
         throw new UnsupportedOperationException("Unexpected protocol:" + protocol);
     }
 
     @Override
     public URLStreamHandlerFactory createURLStreamHandlerFactory() {
         return new CronetURLStreamHandlerFactory(this);
     }
 
+    @Override
+    public void putHostCache(String hostName, InetAddress[] ipAddresses, int secondsToLive) {
+        byte[][] addresses = new byte[ipAddresses.length][];
+        for (int i = 0; i < ipAddresses.length; i++) {
+            addresses[i] = ipAddresses[i].getAddress();
+        }
+        synchronized (mLock) {
+            checkHaveAdapter();
+            nativePutHostCache(mUrlRequestContextAdapter, hostName, addresses, secondsToLive);
+        }
+    }
+
     /**
      * Mark request as started to prevent shutdown when there are active
      * requests.
      */
     void onRequestStarted() {
         mActiveRequestCount.incrementAndGet();
     }
 
     /**
      * Mark request as finished to allow shutdown when there are no active
@@ skipping 199 matching lines @@
     @NativeClassQualifiedName("CronetURLRequestContextAdapter")
     private native void nativeConfigureNetworkQualityEstimatorForTesting(long nativePtr,
             boolean useLocalHostRequests, boolean useSmallerResponses, boolean disableOfflineCheck);
 
     @NativeClassQualifiedName("CronetURLRequestContextAdapter")
     private native void nativeProvideRTTObservations(long nativePtr, boolean should);
 
     @NativeClassQualifiedName("CronetURLRequestContextAdapter")
     private native void nativeProvideThroughputObservations(long nativePtr, boolean should);
 
+    @NativeClassQualifiedName("CronetURLRequestContextAdapter")
+    private native void nativePutHostCache(
+            long nativePtr, String hostName, byte[][] addresses, int secondsToLive);
+
     public boolean isNetworkThread(Thread thread) {
         return thread == mNetworkThread;
     }
 }