Test file errors in downloads.

content/public/browser/download_id.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_PUBLIC_BROWSER_DOWNLOAD_ID_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_ID_H_
 #pragma once
 
 #include <iosfwd>
 #include <string>
 
 #include "base/hash_tables.h"
 #include "base/stringprintf.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 // DownloadId combines per-profile Download ids with an indication of which
 // profile in order to be globally unique. DownloadIds are not persistent across
 // sessions, but their local() field is.
 class DownloadId {
  public:
-  static DownloadId Invalid() { return DownloadId(NULL, -1); }
+  static DownloadId Invalid() { return DownloadId(); }
 
   // Domain separates spaces of local ids.
   typedef const void* Domain;
 
+  DownloadId() : domain_(NULL), local_id_(-1) {}
+
   DownloadId(Domain domain, int32 local_id)
     : domain_(domain),
       local_id_(local_id) {
   }
 
   // Return the per-profile and persistent part of this DownloadId.
   int32 local() const { return local_id_; }
 
   // Returns true if this DownloadId has been allocated and could possibly refer
   // to a DownloadItem that exists.
@@ skipping 54 matching lines @@
     return id.hash();
   }
 };
 #elif defined(COMPILER_MSVC)
 inline size_t hash_value(const content::DownloadId& id) {
   return id.hash();
 }
 #endif  // COMPILER
 }
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_ID_H_