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

chrome/browser/memory_details.h

 // Copyright (c) 2012 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_MEMORY_DETAILS_H_
 #define CHROME_BROWSER_MEMORY_DETAILS_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 23 matching lines @@
     RENDERER_INTERSTITIAL,  // malware/phishing interstitial
     RENDERER_BACKGROUND_APP // hosted app background page
   };
 
   static std::string GetRendererTypeNameInEnglish(RendererProcessType type);
   static std::string GetFullTypeNameInEnglish(
       int process_type,
       RendererProcessType rtype);
 
   ProcessMemoryInformation();
+  ProcessMemoryInformation(const ProcessMemoryInformation& other);
   ~ProcessMemoryInformation();
 
   // Default ordering is by private memory consumption.
   bool operator<(const ProcessMemoryInformation& rhs) const;
 
   // The process id.
   base::ProcessId pid;
   // The working set information.
   base::WorkingSetKBytes working_set;
   // The committed bytes.
@@ skipping 123 matching lines @@
   std::vector<ProcessData> process_data_;
 
 #if defined(OS_CHROMEOS)
   base::SwapInfo swap_info_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(MemoryDetails);
 };
 
 #endif  // CHROME_BROWSER_MEMORY_DETAILS_H_