Move Cronet metrics-related classes into their own files

components/cronet/android/api/src/org/chromium/net/JavaCronetEngine.java

 // Copyright 2015 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 static android.os.Process.THREAD_PRIORITY_BACKGROUND;
 import static android.os.Process.THREAD_PRIORITY_MORE_FAVORABLE;
 
 import java.io.IOException;
@@ skipping 102 matching lines @@
     @Override
     public void removeRttListener(NetworkQualityRttListener listener) {}
 
     @Override
     public void addThroughputListener(NetworkQualityThroughputListener listener) {}
 
     @Override
     public void removeThroughputListener(NetworkQualityThroughputListener listener) {}
 
     @Override
-    public void addRequestFinishedListener(RequestFinishedListener listener) {}
+    public void addRequestFinishedListener(RequestFinishedInfo.Listener listener) {}
 
     @Override
-    public void removeRequestFinishedListener(RequestFinishedListener listener) {}
+    public void removeRequestFinishedListener(RequestFinishedInfo.Listener listener) {}
 
     @Override
     public URLConnection openConnection(URL url) throws IOException {
         return url.openConnection();
     }
 
     @Override
     public URLConnection openConnection(URL url, Proxy proxy) throws IOException {
         return url.openConnection(proxy);
     }
 
     @Override
     public URLStreamHandlerFactory createURLStreamHandlerFactory() {
         // Returning null causes this factory to pass though, which ends up using the platform's
         // implementation.
         return new URLStreamHandlerFactory() {
             @Override
             public URLStreamHandler createURLStreamHandler(String protocol) {
                 return null;
             }
         };
     }
 }