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

components/autofill/core/browser/legal_message_line.h

 // Copyright 2016 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_AUTOFILL_CORE_BROWSER_LEGAL_MESSAGE_LINE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_LEGAL_MESSAGE_LINE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 18 matching lines @@
  public:
   struct Link {
     Link(size_t start, size_t end, const std::string& url_spec);
     ~Link();
 
     gfx::Range range;
     GURL url;
   };
 
   LegalMessageLine();
+  LegalMessageLine(const LegalMessageLine& other);
   virtual ~LegalMessageLine();  // Overridden in TestLegalMessageLine.
 
   // Parses |legal_message|. Returns false on failure.
   //
   // Example of valid |legal_message| data:
   // {
   //   "line" : [ {
   //     "template" : "The legal documents are: {0} and {1}",
   //     "template_parameter" : [ {
   //       "display_text" : "Terms of Service",
@@ skipping 28 matching lines @@
 
   bool ParseLine(const base::DictionaryValue& line);
 
   base::string16 text_;
   std::vector<Link> links_;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_LEGAL_MESSAGE_LINE_H_