[Cronet] change InitializeOnNetworkThread to use URLRequestContextBuilder

components/cronet/ios/Cronet.mm

 // Copyright 2016 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.
 
 #import "components/cronet/ios/Cronet.h"
 
 #include <memory>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 90 matching lines @@
 
 }  // namespace
 
 @implementation Cronet
 
 + (void)configureCronetEnvironmentForTesting:
     (cronet::CronetEnvironment*)cronetEnvironment {
   if (gEnableTestCertVerifierForTesting) {
     std::unique_ptr<TestCertVerifier> test_cert_verifier =
         base::MakeUnique<TestCertVerifier>();
-    cronetEnvironment->set_cert_verifier(std::move(test_cert_verifier));
+    cronetEnvironment->set_mock_cert_verifier(std::move(test_cert_verifier));
   }
 }
 
 + (NSString*)getAcceptLanguages {
   // Use the framework bundle to search for resources.
   NSBundle* frameworkBundle = [NSBundle bundleForClass:self];
   NSString* bundlePath =
       [frameworkBundle pathForResource:@"cronet_resources" ofType:@"bundle"];
   NSBundle* bundle = [NSBundle bundleWithPath:bundlePath];
   NSString* acceptLanguages = NSLocalizedStringWithDefaultValue(
@@ skipping 157 matching lines @@
       base::SysNSStringToUTF8(hostResolverRulesForTesting));
 }
 
 // This is a non-public dummy method that prevents the linker from stripping out
 // the otherwise non-referenced methods from 'bidirectional_stream.cc'.
 + (void)preventStrippingCronetBidirectionalStream {
   bidirectional_stream_create(NULL, 0, 0);
 }
 
 @end