Added Network Quality Estimator Real-time interface to Cronet

components/cronet/android/java/src/org/chromium/net/UrlRequestContext.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;
 
 import android.content.Context;
 import android.util.Log;
 
 import java.lang.reflect.Constructor;
@@ skipping 70 matching lines @@
      *            false, NetLogCaptureMode::Default() is used instead.
      */
     public abstract void startNetLogToFile(String fileName, boolean logAll);
 
     /**
      * Stops NetLog logging and flushes file to disk. If a logging session is
      * not in progress, this call is ignored.
      */
     public abstract void stopNetLog();
 
+    public abstract void configureNetworkQualityEstimator(

[mef, 2015/08/11 17:16:27]

need javadoc comments for all of these. 
Does it make sense to extract them into separate interface?

[bengr, 2015/08/25 23:43:34]

Done. I don't think a separate interface is needed yet. If we expand NQE support
in Cronet, we may consider it.

+            boolean useLocalHostRequests, boolean useSmallerResponses);
+    public abstract void addRTTObserver(RTTObserver observer);
+    public abstract void removeRTTObserver(RTTObserver observer);
+    public abstract void addBandwidthObserver(BandwidthObserver observer);
+    public abstract void removeBandwidthObserver(BandwidthObserver observer);
+
     /**
      * Create context with given config. If config.legacyMode is true, or
      * native library is not available, then creates HttpUrlConnection-based
      * context.
      * @param context application context.
      * @param config context configuration.
      */
     public static UrlRequestContext createContext(Context context,
             UrlRequestContextConfig config) {
         UrlRequestContext urlRequestContext = null;
@@ skipping 32 matching lines @@
         } catch (ClassNotFoundException e) {
             // Leave as null.
         } catch (Exception e) {
             throw new IllegalStateException(
                     "Cannot instantiate: " + CRONET_URL_REQUEST_CONTEXT,
                     e);
         }
         return urlRequestContext;
     }
 }