IndexedDB: Fix coding style issues c/o cpplint.py

content/browser/indexed_db/indexed_db_dispatcher_host.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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 78 matching lines @@
   // id in the high 32 bits. The mapping is host-specific and ids are validated.
   int64 HostTransactionId(int64 transaction_id);
   int64 RendererTransactionId(int64 host_transaction_id);
 
   // These are called to decode a host transaction ID, for diagnostic purposes.
   static uint32 TransactionIdToRendererTransactionId(int64 host_transaction_id);
   static uint32 TransactionIdToProcessId(int64 host_transaction_id);
 
   void HoldBlobDataHandle(
       const std::string& uuid,
-      scoped_ptr<webkit_blob::BlobDataHandle>& blob_data_handle);
+      scoped_ptr<webkit_blob::BlobDataHandle> blob_data_handle);
   void DropBlobDataHandle(const std::string& uuid);
 
  private:
   // Friends to enable OnDestruct() delegation.
   friend class BrowserThread;
   friend class base::DeleteHelper<IndexedDBDispatcherHost>;
 
   virtual ~IndexedDBDispatcherHost();
 
   // Message processing. Most of the work is delegated to the dispatcher hosts
@@ skipping 170 matching lines @@
 
   // Used to set file permissions for blob storage.
   int ipc_process_id_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_