[Cronet] Allow UrlRequest bypass cache

components/cronet/android/java/src/org/chromium/net/urlconnection/CronetHttpURLConnection.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.urlconnection;
 
 import android.util.Pair;
 
 import org.chromium.net.ExtendedResponseInfo;
 import org.chromium.net.ResponseInfo;
@@ skipping 53 matching lines @@
     @Override
     public void connect() throws IOException {
         if (connected) {
             checkHasResponse();
             return;
         }
         connected = true;
         for (Pair<String, String> requestHeader : mRequestHeaders) {
             mRequest.addHeader(requestHeader.first, requestHeader.second);
         }
+        if (!getUseCaches()) {
+            mRequest.disableCache();
+        }
         mRequest.start();
         // Blocks until onResponseStarted or onFailed is called.
         mMessageLoop.loop();
         checkHasResponse();
     }
 
     /**
      * Releases this connection so that its resources may be either reused or
      * closed.
      */
@@ skipping 330 matching lines @@
             return null;
         }
         List<Pair<String, String>> headers =
                 mResponseInfo.getAllHeadersAsList();
         if (pos >= headers.size()) {
             return null;
         }
         return headers.get(pos);
     }
 }