Avoid large inlined automatic methods in IndexedDB code.

content/common/indexed_db/indexed_db_key_path.cc

 // 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.
 
 #include "content/common/indexed_db/indexed_db_key_path.h"
 
 #include "base/logging.h"
 
 namespace content {
 
 using blink::WebIDBKeyPathTypeArray;
 using blink::WebIDBKeyPathTypeNull;
 using blink::WebIDBKeyPathTypeString;
 
 IndexedDBKeyPath::IndexedDBKeyPath() : type_(WebIDBKeyPathTypeNull) {}
 
 IndexedDBKeyPath::IndexedDBKeyPath(const base::string16& string)
     : type_(WebIDBKeyPathTypeString), string_(string) {}
 
 IndexedDBKeyPath::IndexedDBKeyPath(const std::vector<base::string16>& array)
     : type_(WebIDBKeyPathTypeArray), array_(array) {}
 
-IndexedDBKeyPath::~IndexedDBKeyPath() {}
+IndexedDBKeyPath::IndexedDBKeyPath(const IndexedDBKeyPath& other) = default;
+IndexedDBKeyPath::~IndexedDBKeyPath() = default;
+IndexedDBKeyPath& IndexedDBKeyPath::operator=(const IndexedDBKeyPath& other) =
+    default;
 
 const std::vector<base::string16>& IndexedDBKeyPath::array() const {
   DCHECK(type_ == blink::WebIDBKeyPathTypeArray);
   return array_;
 }
 
 const base::string16& IndexedDBKeyPath::string() const {
   DCHECK(type_ == blink::WebIDBKeyPathTypeString);
   return string_;
 }
 
 bool IndexedDBKeyPath::operator==(const IndexedDBKeyPath& other) const {
   if (type_ != other.type_)
     return false;
 
   switch (type_) {
     case WebIDBKeyPathTypeNull:
       return true;
     case WebIDBKeyPathTypeString:
       return string_ == other.string_;
     case WebIDBKeyPathTypeArray:
       return array_ == other.array_;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace content