[NoStatePrefetch] Do not send responses to renderer in prefetch mode.

content/browser/loader/resource_dispatcher_host_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 <stddef.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 1475 matching lines @@
   ASSERT_EQ(ResourceMsg_ReceivedResponse::ID, msgs[3][0].type());
   CheckRequestCompleteErrorCode(msgs[3][1], net::ERR_ABORTED);
 
   // However, request 4 should have actually gone to completion. (Only request 2
   // was canceled.)
   EXPECT_EQ(4, network_delegate()->completed_requests());
   EXPECT_EQ(1, network_delegate()->canceled_requests());
   EXPECT_EQ(0, network_delegate()->error_count());
 }
 
+TEST_P(ResourceDispatcherHostTest, DownloadToNetworkCache) {
+  // Normal request.
+  MakeTestRequest(0, 1, net::URLRequestTestJob::test_url_2());
+
+  // Cache-only request.
+  ResourceRequest request_to_cache = CreateResourceRequest(
+      "GET", RESOURCE_TYPE_IMAGE, net::URLRequestTestJob::test_url_3());
+  request_to_cache.download_to_network_cache_only = true;
+  ResourceHostMsg_RequestResource msg_to_cache(0, 2, request_to_cache);
+  host_.OnMessageReceived(msg_to_cache, filter_.get());
+
+  KickOffRequest();
+
+  // The handler for the cache-only request should have been detached now.
+  GlobalRequestID global_request_id(filter_->child_id(), 2);
+  ResourceRequestInfoImpl* info = ResourceRequestInfoImpl::ForRequest(
+      host_.GetURLRequest(global_request_id));
+  ASSERT_TRUE(info->detachable_handler()->is_detached());
+
+  // Flush all the pending requests.
+  while (net::URLRequestTestJob::ProcessOnePendingMessage()) {}
+  base::RunLoop().RunUntilIdle();
+
+  // Everything should be out now.
+  EXPECT_EQ(0, host_.pending_requests());
+
+  ResourceIPCAccumulator::ClassifiedMessages msgs;
+  accum_.GetClassifiedMessages(&msgs);
+
+  // there are two requests, so we should have gotten them classified as such.

[mmenke, 2016/08/25 19:36:43]

nit:  Capitalize "There"

+  ASSERT_EQ(2U, msgs.size());
+
+  // The normal request succeeded.
+  CheckSuccessfulRequest(msgs[0], net::URLRequestTestJob::test_data_2());
+
+  // The cache-only request got canceled, as far as the renderer is concerned.
+  ASSERT_EQ(1U, msgs[1].size());
+  CheckRequestCompleteErrorCode(msgs[1][0], net::ERR_ABORTED);
+
+  // However, all requests should have actually gone to completion.
+  EXPECT_EQ(2, network_delegate()->completed_requests());
+  EXPECT_EQ(0, network_delegate()->canceled_requests());
+  EXPECT_EQ(0, network_delegate()->error_count());
+}
+
 // Shows that detachable requests will timeout if the request takes too long to
 // complete.
 TEST_P(ResourceDispatcherHostTest, DetachedResourceTimesOut) {
   MakeTestRequestWithResourceType(filter_.get(), 0, 1,
                                   net::URLRequestTestJob::test_url_2(),
                                   RESOURCE_TYPE_PREFETCH);  // detachable type
   GlobalRequestID global_request_id(filter_->child_id(), 1);
   ResourceRequestInfoImpl* info = ResourceRequestInfoImpl::ForRequest(
       host_.GetURLRequest(global_request_id));
   ASSERT_TRUE(info->detachable_handler());
@@ skipping 2317 matching lines @@
   return nullptr;
 }
 
 INSTANTIATE_TEST_CASE_P(
     ResourceDispatcherHostTests,
     ResourceDispatcherHostTest,
     testing::Values(TestConfig::kDefault,
                     TestConfig::kOptimizeIPCForSmallResourceEnabled));
 
 }  // namespace content