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

components/suggestions/image_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 "components/suggestions/image_manager.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 36 matching lines @@
   image_fetcher_->SetImageFetcherDelegate(this);
   database_->Init(kDatabaseUMAClientName, database_dir,
                   base::Bind(&ImageManager::OnDatabaseInit,
                              weak_ptr_factory_.GetWeakPtr()));
 }
 
 ImageManager::~ImageManager() {}
 
 ImageManager::ImageCacheRequest::ImageCacheRequest() {}
 
+ImageManager::ImageCacheRequest::ImageCacheRequest(
+    const ImageCacheRequest& other) = default;
+
 ImageManager::ImageCacheRequest::~ImageCacheRequest() {}
 
 void ImageManager::Initialize(const SuggestionsProfile& suggestions) {
   image_url_map_.clear();
   for (int i = 0; i < suggestions.suggestions_size(); ++i) {
     const ChromeSuggestion& suggestion = suggestions.suggestions(i);
     if (suggestion.has_thumbnail()) {
       image_url_map_[GURL(suggestion.url())] = GURL(suggestion.thumbnail());
     }
   }
@@ skipping 171 matching lines @@
        it != pending_cache_requests_.end(); ++it) {
     const ImageCacheRequest& request = it->second;
     for (CallbackVector::const_iterator callback_it = request.callbacks.begin();
          callback_it != request.callbacks.end(); ++callback_it) {
       ServeFromCacheOrNetwork(request.url, request.image_url, *callback_it);
     }
   }
 }
 
 }  // namespace suggestions