FBTF: Move ctors/dtors into implementation files. Adds ctors/dtors to non-POD structs.

chrome/browser/history/snippet.h

 // Copyright (c) 2006-2008 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.
 
 // This module computes snippets of queries based on hits in the documents
 // for display in history search results.
 
 #ifndef CHROME_BROWSER_HISTORY_SNIPPET_H__
 #define CHROME_BROWSER_HISTORY_SNIPPET_H__
 #pragma once
@@ skipping 25 matching lines @@
   static void ExtractMatchPositions(const std::string& offsets_str,
                                     const std::string& column_num,
                                     MatchPositions* match_positions);
 
   // Converts match positions as returned from ExtractMatchPositions to be in
   // terms of a wide string.
   static void ConvertMatchPositionsToWide(
       const std::string& utf8_string,
       Snippet::MatchPositions* match_positions);
 
+  Snippet();
+  ~Snippet();
+
   // Given |matches|, the match positions within |document|, compute the snippet
   // for the document.
   // Note that |document| is UTF-8 and the offsets in |matches| are byte
   // offsets.
   void ComputeSnippet(const MatchPositions& matches,
                       const std::string& document);
 
   const string16& text() const { return text_; }
   const MatchPositions& matches() const { return matches_; }
 
   // Efficiently swaps the contents of this snippet with the other.
-  void Swap(Snippet* other) {
-    text_.swap(other->text_);
-    matches_.swap(other->matches_);
-  }
+  void Swap(Snippet* other);
 
  private:
   // The text of the snippet.
   string16 text_;
 
   // The matches within text_.
   MatchPositions matches_;
 };
 
 #endif  // CHROME_BROWSER_HISTORY_SNIPPET_H__