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

chrome/common/extensions/manifest_handlers/linked_app_icons.cc

 // Copyright 2015 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/manifest_handlers/linked_app_icons.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "extensions/common/manifest.h"
@@ skipping 19 matching lines @@
 
 LinkedAppIcons::IconInfo::IconInfo() {
 }
 
 LinkedAppIcons::IconInfo::~IconInfo() {
 }
 
 LinkedAppIcons::LinkedAppIcons() {
 }
 
+LinkedAppIcons::LinkedAppIcons(const LinkedAppIcons& other) = default;
+
 LinkedAppIcons::~LinkedAppIcons() {
 }
 
 // static
 const LinkedAppIcons& LinkedAppIcons::GetLinkedAppIcons(
     const Extension* extension) {
   return GetInfo(extension);
 }
 
 LinkedAppIconsHandler::LinkedAppIconsHandler() {
@@ skipping 49 matching lines @@
 
   extension->SetManifestData(keys::kLinkedAppIcons, linked_app_icons.release());
   return true;
 }
 
 const std::vector<std::string> LinkedAppIconsHandler::Keys() const {
   return SingleKey(keys::kLinkedAppIcons);
 }
 
 }  // namespace extensions