Add slice information to DownloadDestinationObserver::DestinationUpdate().

content/browser/download/download_destination_observer.h

Index: content/browser/download/download_destination_observer.h
diff --git a/content/browser/download/download_destination_observer.h b/content/browser/download/download_destination_observer.h
index 5bde275134dee05b73316728590395d0707a9385..7fb6297b63b5efc9a7ad1c9d18d9d9fff27f190b 100644
--- a/content/browser/download/download_destination_observer.h
+++ b/content/browser/download/download_destination_observer.h
@@ -11,6 +11,7 @@
 #include <string>
 
 #include "content/public/browser/download_interrupt_reasons.h"
+#include "content/public/browser/download_item.h"
 #include "crypto/secure_hash.h"
 
 namespace content {
@@ -27,8 +28,10 @@ namespace content {
 // Note that this interface does not deal with cross-thread lifetime issues.
 class DownloadDestinationObserver {
  public:
-  virtual void DestinationUpdate(int64_t bytes_so_far,
-                                 int64_t bytes_per_sec) = 0;
+  virtual void DestinationUpdate(
+      int64_t bytes_so_far,
+      int64_t bytes_per_sec,
+      const std::vector<DownloadItem::ReceivedSlice>& received_slices) = 0;

[xingliu, 2017/02/28 22:36:00]

This is called every 0.5 second, is received_slices only used for update the
history db?

[qinmin, 2017/02/28 22:38:21]

yes, we need to keep the history db up-to-date.

 
   virtual void DestinationError(
       DownloadInterruptReason reason,