Avoid large inlined automatic methods in IndexedDB code.

content/browser/indexed_db/indexed_db_value.h

 // Copyright 2014 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_VALUE_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_VALUE_H_
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "content/browser/indexed_db/indexed_db_blob_info.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 struct CONTENT_EXPORT IndexedDBValue {
   IndexedDBValue();
   IndexedDBValue(const std::string& input_bits,
                  const std::vector<IndexedDBBlobInfo>& input_blob_info);
+  IndexedDBValue(const IndexedDBValue& other);
   ~IndexedDBValue();
+  IndexedDBValue& operator=(const IndexedDBValue& other);
 
   void swap(IndexedDBValue& value) {
     bits.swap(value.bits);
     blob_info.swap(value.blob_info);
   }
 
   bool empty() const { return bits.empty(); }
   void clear() {
     bits.clear();
     blob_info.clear();
   }
 
   size_t SizeEstimate() const {
     return bits.size() + blob_info.size() * sizeof(IndexedDBBlobInfo);
   }
 
   std::string bits;
   std::vector<IndexedDBBlobInfo> blob_info;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_VALUE_H_