Range request support for parallel download in DownloadRequestCore.

content/public/browser/download_save_info.cc

Index: content/public/browser/download_save_info.cc
diff --git a/content/public/browser/download_save_info.cc b/content/public/browser/download_save_info.cc
index eabc761ec677cba4d374419d5aee75aeafd006c3..3e3e719c8ed0270dd3dc049e6af74afebecbc172 100644
--- a/content/public/browser/download_save_info.cc
+++ b/content/public/browser/download_save_info.cc
@@ -6,9 +6,11 @@
 
 namespace content {
 
+// static
+const int DownloadSaveInfo::kLengthUnknown = -1;
+
 DownloadSaveInfo::DownloadSaveInfo()
-    : offset(0), prompt_for_save_location(false) {
-}
+    : offset(0), length(kLengthUnknown), prompt_for_save_location(false) {}
 
 DownloadSaveInfo::~DownloadSaveInfo() {
 }
@@ -18,6 +20,7 @@ DownloadSaveInfo::DownloadSaveInfo(DownloadSaveInfo&& that)
       suggested_name(std::move(that.suggested_name)),
       file(std::move(that.file)),
       offset(that.offset),
+      length(that.length),
       hash_state(std::move(that.hash_state)),
       hash_of_partial_file(std::move(that.hash_of_partial_file)),
       prompt_for_save_location(that.prompt_for_save_location) {}