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

components/suggestions/image_manager.h

 // 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.
 
 #ifndef COMPONENTS_SUGGESTIONS_IMAGE_MANAGER_H_
 #define COMPONENTS_SUGGESTIONS_IMAGE_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 63 matching lines @@
 
   typedef std::vector<base::Callback<void(const GURL&, const SkBitmap*)> >
       CallbackVector;
   typedef base::hash_map<std::string, scoped_refptr<base::RefCountedMemory>>
       ImageMap;
 
   // State related to an image fetch (associated website url, image_url,
   // pending callbacks).
   struct ImageCacheRequest {
     ImageCacheRequest();
+    ImageCacheRequest(const ImageCacheRequest& other);
     ~ImageCacheRequest();
 
     GURL url;
     GURL image_url;
     // Queue for pending callbacks, which may accumulate while the request is in
     // flight.
     CallbackVector callbacks;
   };
 
   typedef std::map<const GURL, ImageCacheRequest> ImageCacheRequestMap;
@@ skipping 57 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<ImageManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageManager);
 };
 
 }  // namespace suggestions
 
 #endif  // COMPONENTS_SUGGESTIONS_IMAGE_MANAGER_H_