Dispatch transfer size update notification on mojo-loading

content/browser/loader/mojo_async_resource_handler.h

Index: content/browser/loader/mojo_async_resource_handler.h
diff --git a/content/browser/loader/mojo_async_resource_handler.h b/content/browser/loader/mojo_async_resource_handler.h
index 81a2f85a61140d5f7ec0c96435d9da48b3328fc1..1aa77421a7106a015e2babe3e106c21b2f296d63 100644
--- a/content/browser/loader/mojo_async_resource_handler.h
+++ b/content/browser/loader/mojo_async_resource_handler.h
@@ -91,6 +91,7 @@ class CONTENT_EXPORT MojoAsyncResourceHandler
   bool CheckForSufficientResource();
   void OnWritable(MojoResult result);
   void Cancel();
+  int64_t CalculateTransferSizeDiff();

[mmenke, 2016/12/13 20:01:25]

Mind adding a description to what this does?  Not clear that it reports extra
bytes read since the last call to this method.

Also maybe rename it.  CalculateRecentlyReceivedBytes?  (Received is clearer
than transfer, recently at least gives some implication that there's a time
window involved, though isn't completely on clear on what that is).  Or
GetBytesReceivedSinceLastCall?

[yhirano, 2016/12/14 16:47:27]

Done.

   // This function can be overriden only for tests.
   virtual void ReportBadMessage(const std::string& error);