Fix history importing by delaying DownloadManager creation.

content/browser/download/save_package.cc

Index: content/browser/download/save_package.cc
diff --git a/content/browser/download/save_package.cc b/content/browser/download/save_package.cc
index be2c0518280d2102bdbe3e20d6be72795b09b814..580174500d7676c0c1b39bda8fb128aba531b68d 100644
--- a/content/browser/download/save_package.cc
+++ b/content/browser/download/save_package.cc
@@ -21,6 +21,7 @@
 #include "content/browser/browser_context.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/download/download_file_manager.h"
+#include "content/browser/download/download_id_factory.h"
 #include "content/browser/download/download_item.h"
 #include "content/browser/download/download_manager.h"
 #include "content/browser/download/save_file.h"
@@ -30,6 +31,7 @@
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
+#include "content/browser/resource_context.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/content_browser_client.h"
@@ -268,7 +270,8 @@ bool SavePackage::Init() {
                                saved_main_file_path_,
                                page_url_,
                                browser_context->IsOffTheRecord(),
-                               download_manager_->GetNextId());
+                               browser_context->GetResourceContext().
+                                 download_id_factory()->GetNextId());
   download_->AddObserver(this);
 
   // Transfer ownership to the download manager.