interrupt and resume download with CONTENT_LENGTH_MISMATCH errors

content/browser/download/download_item_impl.h

Index: content/browser/download/download_item_impl.h
diff --git a/content/browser/download/download_item_impl.h b/content/browser/download/download_item_impl.h
index 4a6e31919f3ed0e0db75ccf0bb60c3dec74a9fc4..82c0f272e5e21d57a408e955804976be6bc225f0 100644
--- a/content/browser/download/download_item_impl.h
+++ b/content/browser/download/download_item_impl.h
@@ -713,6 +713,10 @@ class CONTENT_EXPORT DownloadItemImpl
 
   std::unique_ptr<DownloadJob> job_;
 
+  // The bytes received if the download was interrupted with

[asanka, 2017/04/26 21:17:33]

Nit: Value of |received_bytes_| at the time the download was interrupted with
CONTENT_LENGTH_MISMATCH.

Otherwise it's not clear why this field exists.

Also, initialize it here. So it's clear what the default value is without
hunting down constructors.

Also, call it something like "received_bytes_at_length_mismatch".

[qinmin, 2017/04/27 18:20:54]

Done.

+  // CONTENT_LENGTH_MISMATCH error. -1 if the download never get this error.
+  int64_t received_bytes_if_content_length_mismatch_;
+
   base::WeakPtrFactory<DownloadItemImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImpl);