Remove DCHECK from the component updater background downloader code.

components/update_client/background_downloader_win.cc

 // Copyright 2014 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 "components/update_client/background_downloader_win.h"
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <stddef.h>
 
 #include <stdint.h>
 #include <functional>
 #include <iomanip>
 #include <limits>
+#include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 841 matching lines @@
   ScopedComPtr<IGlobalInterfaceTable> git;
   HRESULT hr = GetGit(&git);
   if (FAILED(hr))
     return hr;
 
   const DWORD cookies[] = {
       git_cookie_job_, git_cookie_bits_manager_
   };
 
   for (auto cookie : cookies) {
-    hr = git->RevokeInterfaceFromGlobal(cookie);
-    DCHECK(SUCCEEDED(hr));
+    // TODO(sorin): check the result of the call, see crbug.com/644857.
+    git->RevokeInterfaceFromGlobal(cookie);
   }
 
   return S_OK;
 }
 
 }  // namespace update_client