Clean up entries left by crashes in the DownloadDB.

content/browser/download/download_item_impl.cc

 // 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.
 
 // File method ordering: Methods in this file are in the same order as
 // in download_item_impl.h, with the following exception: The public
 // interface Start is placed in chronological order with the other
 // (private) routines that together define a DownloadItem's state
 // transitions as the download progresses.  See "Download progression
 // cascade" later in this file.
@@ skipping 115 matching lines @@
       file_externally_removed_(false),
       auto_opened_(false),
       is_temporary_(false),
       all_data_saved_(state == COMPLETE),
       destination_error_(content::DOWNLOAD_INTERRUPT_REASON_NONE),
       opened_(opened),
       delegate_delayed_complete_(false),
       bound_net_log_(bound_net_log),
       ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
   delegate_->Attach();
-  if (state_ == IN_PROGRESS_INTERNAL) {
-    state_ = INTERRUPTED_INTERNAL;
-    last_reason_ = DOWNLOAD_INTERRUPT_REASON_CRASH;
-  }
+  DCHECK_NE(IN_PROGRESS_INTERNAL, state_);
   Init(false /* not actively downloading */, SRC_HISTORY_IMPORT);
 }
 
 // Constructing for a regular download:
 DownloadItemImpl::DownloadItemImpl(
     DownloadItemImplDelegate* delegate,
     const DownloadCreateInfo& info,
     const net::BoundNetLog& bound_net_log)
     : is_save_package_download_(false),
       download_id_(info.download_id),
@@ skipping 1525 matching lines @@
     case RESUME_MODE_USER_CONTINUE:
       return "USER_CONTINUE";
     case RESUME_MODE_USER_RESTART:
       return "USER_RESTART";
   }
   NOTREACHED() << "Unknown resume mode " << mode;
   return "unknown";
 }
 
 }  // namespace content