[Download] Return DownloadInterruptReason from OnStartedCallback

content/browser/download/download_interrupt_reasons_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.
 
 #include "content/browser/download/download_interrupt_reasons_impl.h"
 
 #include "base/logging.h"
 
 namespace content {
 
@@ skipping 70 matching lines @@
       return DOWNLOAD_INTERRUPT_REASON_SERVER_FAILED;
     default:
       break;
   }
 
   NOTREACHED();
 
   return DOWNLOAD_INTERRUPT_REASON_NONE;
 }
 
-std::string InterruptReasonDebugString(DownloadInterruptReason error) {
+std::string DownloadInterruptReasonToString(DownloadInterruptReason error) {
 
 #define INTERRUPT_REASON(name, value)  \
     case DOWNLOAD_INTERRUPT_REASON_##name: return #name;
 
   switch (error) {
     INTERRUPT_REASON(NONE, 0)
 
 #include "content/public/browser/download_interrupt_reason_values.h"
 
     default:
       break;
   }
 
 #undef INTERRUPT_REASON
 
   return "Unknown error";
 }
 
 }  // namespace content