[Cronet] Remove CronetEngine.Builder JSON serial/deserialization APIs

components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.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.content.ContextWrapper;
 import android.os.ConditionVariable;
 import android.os.Handler;
@@ skipping 110 matching lines @@
     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testConfigUserAgent() throws Exception {
         String userAgentName = "User-Agent";
         String userAgentValue = "User-Agent-Value";
         CronetEngine.Builder cronetEngineBuilder = new CronetEngine.Builder(getContext());
         cronetEngineBuilder.setUserAgent(userAgentValue);
         cronetEngineBuilder.setLibraryName("cronet_tests");
-        String[] commandLineArgs = {CronetTestFramework.CONFIG_KEY, cronetEngineBuilder.toString()};
-        mTestFramework =
-                startCronetTestFrameworkWithUrlAndCommandLineArgs(TEST_URL, commandLineArgs);
+        mTestFramework = startCronetTestFrameworkWithUrlAndCronetEngineBuilder(
+                TEST_URL, cronetEngineBuilder);
         assertTrue(NativeTestServer.startNativeTestServer(getContext()));
         TestUrlRequestCallback callback = new TestUrlRequestCallback();
         UrlRequest.Builder urlRequestBuilder =
                 new UrlRequest.Builder(NativeTestServer.getEchoHeaderURL(userAgentName), callback,
                         callback.getExecutor(), mTestFramework.mCronetEngine);
         urlRequestBuilder.build().start();
         callback.blockForDone();
         assertEquals(userAgentValue, callback.mResponseAsString);
     }
 
@@ skipping 616 matching lines @@
                 new CronetUrlRequestContext(mTestFramework.createCronetEngineBuilder(getContext()));
         CronetEngine secondEngine = new CronetUrlRequestContext(
                 mTestFramework.createCronetEngineBuilder(getContext().getApplicationContext()));
         CronetEngine thirdEngine = new CronetUrlRequestContext(
                 mTestFramework.createCronetEngineBuilder(new ContextWrapper(getContext())));
         firstEngine.shutdown();
         secondEngine.shutdown();
         thirdEngine.shutdown();
     }
 }