Enable Expect-Staple in SSLClientSocket.

net/http/transport_security_state.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 "net/http/transport_security_state.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 696 matching lines @@
   if (!base::JSONWriter::Write(report, out_serialized_report))
     return false;
   return true;
 }
 
 }  // namespace
 
 TransportSecurityState::TransportSecurityState()
     : enable_static_pins_(true),
       enable_static_expect_ct_(true),
-      enable_static_expect_staple_(false),
+      enable_static_expect_staple_(true),
       enable_pkp_bypass_for_local_trust_anchors_(true),
       sent_reports_cache_(kMaxHPKPReportCacheEntries) {
 // Static pinning is only enabled for official builds to make sure that
 // others don't end up with pins that cannot be easily updated.
 #if !defined(OFFICIAL_BUILD) || defined(OS_ANDROID) || defined(OS_IOS)
   enable_static_pins_ = false;
   enable_static_expect_ct_ = false;
 #endif
   DCHECK(CalledOnValidThread());
 }
@@ skipping 894 matching lines @@
 TransportSecurityState::PKPStateIterator::PKPStateIterator(
     const TransportSecurityState& state)
     : iterator_(state.enabled_pkp_hosts_.begin()),
       end_(state.enabled_pkp_hosts_.end()) {
 }
 
 TransportSecurityState::PKPStateIterator::~PKPStateIterator() {
 }
 
 }  // namespace