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

components/invalidation/public/single_object_invalidation_set.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_INVALIDATION_PUBLIC_SINGLE_OBJECT_INVALIDATION_SET_H_
 #define COMPONENTS_INVALIDATION_PUBLIC_SINGLE_OBJECT_INVALIDATION_SET_H_
 
 #include <stddef.h>
 
 #include <set>
@@ skipping 14 matching lines @@
 // The list is kept sorted by version to make it easier to perform common
 // operations, like checking for an unknown version invalidation or fetching the
 // highest invalidation with the highest version number.
 class INVALIDATION_EXPORT SingleObjectInvalidationSet {
  public:
   typedef std::set<Invalidation, InvalidationVersionLessThan> InvalidationsSet;
   typedef InvalidationsSet::const_iterator const_iterator;
   typedef InvalidationsSet::const_reverse_iterator const_reverse_iterator;
 
   SingleObjectInvalidationSet();
+  SingleObjectInvalidationSet(const SingleObjectInvalidationSet& other);
   ~SingleObjectInvalidationSet();
 
   void Insert(const Invalidation& invalidation);
   void InsertAll(const SingleObjectInvalidationSet& other);
   void Clear();
   void Erase(const_iterator it);
 
   // Returns true if this list contains an unknown version.
   //
   // Unknown version invalidations always end up at the start of the list,
@@ skipping 12 matching lines @@
   scoped_ptr<base::ListValue> ToValue() const;
   bool ResetFromValue(const base::ListValue& list);
 
  private:
   InvalidationsSet invalidations_;
 };
 
 }  // syncer
 
 #endif  // COMPONENTS_INVALIDATION_PUBLIC_SINGLE_OBJECT_INVALIDATION_SET_H_