[net] Switch TestURLRequestContext to use MockCachingHostResolver.

sync/notifier/p2p_notifier_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "sync/notifier/p2p_notifier.h"
 
 #include <cstddef>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "jingle/notifier/base/fake_base_task.h"
 #include "jingle/notifier/base/notifier_options.h"
 #include "jingle/notifier/listener/push_client.h"
+#include "net/base/mock_host_resolver.h"
 #include "net/url_request/url_request_test_util.h"
 #include "sync/notifier/mock_sync_notifier_observer.h"
 #include "sync/syncable/model_type.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace sync_notifier {
 
 namespace {
 
 using ::testing::_;
 using ::testing::Mock;
 using ::testing::StrictMock;
 
+class MyTestURLRequestContext : public TestURLRequestContext {
+ public:
+  MyTestURLRequestContext() : TestURLRequestContext(true) {
+    context_storage_.set_host_resolver(new net::HangingHostResolver());
+    Init();
+  }
+  virtual ~MyTestURLRequestContext() {}
+};
+
 class P2PNotifierTest : public testing::Test {
  protected:
   P2PNotifierTest() {
     notifier_options_.request_context_getter =
-        new TestURLRequestContextGetter(message_loop_.message_loop_proxy());
+        new TestURLRequestContextGetter(
+            message_loop_.message_loop_proxy(),
+            scoped_ptr<TestURLRequestContext>(new MyTestURLRequestContext()));
   }
 
   virtual ~P2PNotifierTest() {}
 
   virtual void SetUp() OVERRIDE {
     p2p_notifier_.reset(new P2PNotifier(notifier_options_, NOTIFY_OTHERS));
     p2p_notifier_->AddObserver(&mock_observer_);
   }
 
   virtual void TearDown() OVERRIDE {
@@ skipping 211 matching lines @@
   Mock::VerifyAndClearExpectations(&mock_observer_);
   p2p_notifier_->SendNotificationDataForTest(
       P2PNotificationData("sender2", NOTIFY_ALL, syncable::ModelTypeSet()));
 
   message_loop_.RunAllPending();
 }
 
 }  // namespace
 
 }  // namespace sync_notifier