Make request fail with ERR_CONTENT_DECODING_INIT_FAILED if sdch is not supported

net/filter/sdch_policy_delegate.cc

 // 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.
 
 #include "net/filter/sdch_policy_delegate.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 #include "net/base/sdch_problem_codes.h"
@@ skipping 115 matching lines @@
     int response_code,
     const NetLogWithSource& net_log)
     : possible_pass_through_(possible_pass_through),
       job_(job),
       mime_type_(mime_type),
       url_(url),
       is_cached_content_(is_cached_content),
       sdch_manager_(sdch_manager),
       dictionary_set_(std::move(dictionary_set)),
       response_code_(response_code),
-      net_log_(net_log) {}
+      net_log_(net_log) {
+  DCHECK(sdch_manager_);
+}
 
 SdchPolicyDelegate::~SdchPolicyDelegate() {}
 
 // static
 void SdchPolicyDelegate::FixUpSdchContentEncodings(
     const NetLogWithSource& net_log,
     const std::string& mime_type,
     SdchManager::DictionarySet* dictionary_set,
     std::vector<SourceStream::SourceType>* types) {
   if (!dictionary_set) {
@@ skipping 296 matching lines @@
     // correct content.
     sdch_manager_->BlacklistDomain(url_, SDCH_META_REFRESH_RECOVERY);
     SdchManager::LogSdchProblem(net_log_, SDCH_META_REFRESH_RECOVERY);
   }
 
   *replace_output = std::string(kRefreshHtml, strlen(kRefreshHtml));
   return REPLACE_OUTPUT;
 }
 
 }  // namespace net