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

chrome/browser/media_galleries/gallery_watch_manager.cc

 // Copyright 2014 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/browser/media_galleries/gallery_watch_manager.h"
 
 #include <stddef.h>
 
 #include <tuple>
 
@@ skipping 149 matching lines @@
 
 bool GalleryWatchManager::WatchOwner::operator<(const WatchOwner& other) const {
   return std::tie(browser_context, extension_id, gallery_id) <
     std::tie(other.browser_context, other.extension_id, other.gallery_id);
 }
 
 GalleryWatchManager::NotificationInfo::NotificationInfo()
     : delayed_notification_pending(false) {
 }
 
+GalleryWatchManager::NotificationInfo::NotificationInfo(
+    const NotificationInfo& other) = default;
+
 GalleryWatchManager::NotificationInfo::~NotificationInfo() {
 }
 
 GalleryWatchManager::GalleryWatchManager()
     : storage_monitor_observed_(false), weak_factory_(this) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   watch_manager_.reset(new FileWatchManager(base::Bind(
       &GalleryWatchManager::OnFilePathChanged, weak_factory_.GetWeakPtr())));
 }
 
@@ skipping 310 matching lines @@
       DeactivateFileWatch(owner, it->second);
       // Post increment moves iterator to next element while deleting current.
       watches_.erase(it++);
       observers_[preferences->profile()]->OnGalleryWatchDropped(
           owner.extension_id, owner.gallery_id);
     } else {
       ++it;
     }
   }
 }