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

chrome/browser/spellchecker/misspelling.h

 // Copyright (c) 2013 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.
 //
 // An object to store user feedback to a single spellcheck suggestion.
 //
 // Stores the spellcheck suggestion, its uint32_t hash identifier, and user's
 // feedback. The feedback is indirect, in the sense that we record user's
 // |action| instead of asking them how they feel about a spellcheck suggestion.
 // The object can serialize itself.
@@ skipping 21 matching lines @@
 //    misspelling.action.set_type(SpellcheckAction::TYPE_SELECT);
 //    misspelling.action.set_index(0);
 //    Process(SerializeMisspelling(misspelling));
 struct Misspelling {
   Misspelling();
   Misspelling(const base::string16& context,
               size_t location,
               size_t length,
               const std::vector<base::string16>& suggestions,
               uint32_t hash);
+  Misspelling(const Misspelling& other);
   ~Misspelling();
 
   // A several-word text snippet that immediately surrounds the misspelling.
   base::string16 context;
 
   // The number of characters between the beginning of |context| and the first
   // misspelled character.
   size_t location;
 
   // The number of characters in the misspelling.
@@ skipping 17 matching lines @@
     const Misspelling& misspelling);
 
 // Returns the substring of |context| that begins at |location| and contains
 // |length| characters.
 base::string16 GetMisspelledString(const Misspelling& misspelling);
 
 // Returns the approximate size of the misspelling when serialized.
 size_t ApproximateSerializedSize(const Misspelling& misspelling);
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_MISSPELLING_H_