chrome: Add out-of-line copy ctors for complex classes.

chrome/common/extensions/api/speech/tts_engine_manifest_handler.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 "chrome/common/extensions/api/speech/tts_engine_manifest_handler.h"
 
 #include <stddef.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 15 matching lines @@
   TtsVoices() {}
   ~TtsVoices() override {}
 
   std::vector<extensions::TtsVoice> voices;
 };
 
 }  // namespace
 
 TtsVoice::TtsVoice() : remote(false) {}
 
+TtsVoice::TtsVoice(const TtsVoice& other) = default;
+
 TtsVoice::~TtsVoice() {}
 
 // static
 const std::vector<TtsVoice>* TtsVoice::GetTtsVoices(
     const Extension* extension) {
   TtsVoices* info = static_cast<TtsVoices*>(
       extension->GetManifestData(keys::kTtsVoices));
   return info ? &info->voices : NULL;
 }
 
@@ skipping 98 matching lines @@
 
   extension->SetManifestData(keys::kTtsVoices, info.release());
   return true;
 }
 
 const std::vector<std::string> TtsEngineManifestHandler::Keys() const {
   return SingleKey(keys::kTtsEngine);
 }
 
 }  // namespace extensions