Added member data to classes to support download resumption.

content/browser/download/download_file_impl.cc

Index: content/browser/download/download_file_impl.cc
diff --git a/content/browser/download/download_file_impl.cc b/content/browser/download/download_file_impl.cc
index f998432675513b7af860553678a6419650528959..1301c7d05080583eb8a5cc3d8fd46466332eee1d 100644
--- a/content/browser/download/download_file_impl.cc
+++ b/content/browser/download/download_file_impl.cc
@@ -21,6 +21,7 @@ DownloadFileImpl::DownloadFileImpl(
             info->url(),
             info->referrer_url,
             info->received_bytes,
+            info->save_info.hash_state,
             info->save_info.file_stream),
       id_(info->download_id),
       request_handle_(request_handle),
@@ -78,6 +79,14 @@ bool DownloadFileImpl::GetSha256Hash(std::string* hash) {
   return file_.GetSha256Hash(hash);
 }
 
+std::string DownloadFileImpl::GetSha256HashState() {
+  return file_.GetSha256HashState();
+}
+
+bool DownloadFileImpl::SetSha256HashState(const std::string& hash_state) {
+  return file_.SetSha256HashState(hash_state);
+}
+
 // DownloadFileInterface implementation.
 void DownloadFileImpl::CancelDownloadRequest() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));