Fix history importing by delaying DownloadManager creation.

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index 9787647ba2fe8252e300c365e9624ac0eae8ba52..8b3d595d73881c282ef32fc864d9ac1d39ff169a 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -16,7 +16,6 @@
 #include "base/synchronization/lock.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/prefs/pref_member.h"
-#include "content/browser/download/download_manager.h"
 #include "content/browser/resource_context.h"
 #include "net/base/cookie_monster.h"
 
@@ -24,6 +23,7 @@ class CommandLine;
 class ChromeAppCacheService;
 class ChromeBlobStorageContext;
 class DesktopNotificationService;
+class DownloadIdFactory;
 class ExtensionInfoMap;
 class HostContentSettingsMap;
 class HostZoomMap;
@@ -294,7 +294,7 @@ class ProfileIOData {
   mutable scoped_refptr<fileapi::FileSystemContext> file_system_context_;
   mutable scoped_refptr<quota::QuotaManager> quota_manager_;
   mutable scoped_refptr<HostZoomMap> host_zoom_map_;
-  mutable DownloadManager::GetNextIdThunkType next_download_id_thunk_;
+  mutable scoped_refptr<DownloadIdFactory> download_id_factory_;
   mutable scoped_ptr<media_stream::MediaStreamManager> media_stream_manager_;
 
   // TODO(willchan): Remove from ResourceContext.