[Cronet] Add API to set DNS cache entry

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

Index: components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java
diff --git a/components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java b/components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java
index f4747a4197cea3f43b1de12d6350c9caa147fde1..827cbab52ab43d76c271169d7b89ea448cf013f2 100644
--- a/components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java
+++ b/components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java
@@ -25,6 +25,7 @@ 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;
@@ -498,6 +499,18 @@ public class CronetUrlRequestContext extends CronetEngineBase {
         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.
@@ -717,6 +730,10 @@ public class CronetUrlRequestContext extends CronetEngineBase {
     @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;
     }