QUIC enable server push by default. Guarded by FLAGS_quic_enable_server_push_by_default.

net/tools/quic/end_to_end_test.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 <sys/epoll.h>
 
 #include <list>
 #include <memory>
 #include <string>
@@ skipping 2748 matching lines @@
   }
 
   // Because of server push, client gets all pushed resources without actually
   // sending requests for them.
   EXPECT_EQ(1u, client_->num_requests());
   // Including response to original request, 12 responses in total were
   // recieved.
   EXPECT_EQ(12u, client_->num_responses());
 }
 
+// TODO(ckrasic) - remove this when deprecating
+// FLAGS_quic_enable_server_push_by_default.
 TEST_P(EndToEndTestServerPush, DisabledWithoutConnectionOption) {
+  FLAGS_quic_enable_server_push_by_default = false;
   // Tests that server push won't be triggered when kSPSH is not set by client.
   support_server_push_ = false;
   ASSERT_TRUE(Initialize());
 
   // Add a response with headers, body, and push resources.
   const string kBody = "body content";
   size_t const kNumResources = 4;
   string push_urls[] = {
       "https://example.com/font.woff", "https://example.com/script.js",
       "https://fonts.example.com/font.woff",
@@ skipping 143 matching lines @@
   EXPECT_EQ(kBarResponseBody, client_->response_body());
   QuicConnectionStats client_stats =
       client_->client()->session()->connection()->GetStats();
   EXPECT_EQ(0u, client_stats.packets_lost);
   EXPECT_EQ(1, client_->client()->GetNumSentClientHellos());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net