Get signals working in the EXTRA_DATA section of MHTML

content/public/common/mhtml_generation_params.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 "content/public/common/mhtml_generation_params.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "content/public/common/content_switches.h"
 
 namespace content {
 
 MHTMLGenerationParams::MHTMLGenerationParams(const base::FilePath& file_path)
     : file_path(file_path) {
   // Check which variant of MHTML generation is required.
   std::string mhtmlGeneratorOptionFlag =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
       switches::kMHTMLGeneratorOption);
   if (mhtmlGeneratorOptionFlag == switches::kMHTMLSkipNostoreMain) {
     cache_control_policy =
         blink::WebFrameSerializerCacheControlPolicy::
         FailForNoStoreMainFrame;
   } else if (mhtmlGeneratorOptionFlag == switches::kMHTMLSkipNostoreAll) {
     cache_control_policy =
         blink::WebFrameSerializerCacheControlPolicy::
         SkipAnyFrameOrResourceMarkedNoStore;
   }
 }
 
+MHTMLGenerationParams::~MHTMLGenerationParams() {}
+
+MHTMLGenerationParams::MHTMLGenerationParams(
+    const MHTMLGenerationParams& other) {
+  file_path = other.file_path;
+  use_binary_encoding = other.use_binary_encoding;
+  cache_control_policy = other.cache_control_policy;
+  extra_data = other.extra_data;
+}
+
 }  // namespace content