Fix history importing by delaying DownloadManager creation.

content/browser/download/download_create_info.cc

 // Copyright (c) 2011 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/browser/download/download_create_info.h"
 
 #include <string>
 
 #include "base/format_macros.h"
 #include "base/stringprintf.h"
 
 DownloadCreateInfo::DownloadCreateInfo(const FilePath& path,
                                        const GURL& url,
                                        const base::Time& start_time,
                                        int64 received_bytes,
                                        int64 total_bytes,
                                        int32 state,
-                                       int32 download_id,
+                                       const DownloadId& download_id,
                                        bool has_user_gesture,
                                        content::PageTransition transition_type)
     : path(path),
       url_chain(1, url),
       path_uniquifier(0),
       start_time(start_time),
       received_bytes(received_bytes),
       total_bytes(total_bytes),
       state(state),
       download_id(download_id),
       has_user_gesture(has_user_gesture),
       transition_type(transition_type),
       db_handle(0),
       prompt_user_for_save_location(false) {
 }
 
 DownloadCreateInfo::DownloadCreateInfo()
     : path_uniquifier(0),
       received_bytes(0),
       total_bytes(0),
       state(-1),
-      download_id(-1),
+      download_id(DownloadId::Invalid()),
       has_user_gesture(false),
       transition_type(content::PAGE_TRANSITION_LINK),
       db_handle(0),
       prompt_user_for_save_location(false) {
 }
 
 DownloadCreateInfo::~DownloadCreateInfo() {
 }
 
 std::string DownloadCreateInfo::DebugString() const {
   return base::StringPrintf("{"
-                            " download_id = %d"
+                            " download_id = %s"
                             " url = \"%s\""
                             " path = \"%" PRFilePath "\""
                             " received_bytes = %" PRId64
                             " total_bytes = %" PRId64
                             " prompt_user_for_save_location = %c"
                             " }",
-                            download_id,
+                            download_id.DebugString().c_str(),
                             url().spec().c_str(),
                             path.value().c_str(),
                             received_bytes,
                             total_bytes,
                             prompt_user_for_save_location ? 'T' : 'F');
 }
 
 const GURL& DownloadCreateInfo::url() const {
   return url_chain.empty() ? GURL::EmptyGURL() : url_chain.back();
 }