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

chrome/browser/extensions/install_signer.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_INSTALL_SIGNER_H_
 #define CHROME_BROWSER_EXTENSIONS_INSTALL_SIGNER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 29 matching lines @@
 
   // The time this signature was obtained from the server. Note that this
   // is computed locally and *not* signed by the server key.
   base::Time timestamp;
 
   // The set of ids that the server indicated were invalid (ie not signed).
   // Note that this is computed locally and *not* signed by the signature.
   ExtensionIdSet invalid_ids;
 
   InstallSignature();
+  InstallSignature(const InstallSignature& other);
   ~InstallSignature();
 
   // Helper methods for serialization to/from a base::DictionaryValue.
   void ToValue(base::DictionaryValue* value) const;
 
   static scoped_ptr<InstallSignature> FromValue(
       const base::DictionaryValue& value);
 };
 
 // Objects of this class encapsulate an operation to get a signature proving
@@ skipping 59 matching lines @@
 
   // The time the request to the server was started.
   base::Time request_start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(InstallSigner);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_INSTALL_SIGNER_H_