Account for HTTP/2 padding in receive windows.

net/spdy/spdy_stream.h

Index: net/spdy/spdy_stream.h
diff --git a/net/spdy/spdy_stream.h b/net/spdy/spdy_stream.h
index ad916bcf6af3e3db32de364ad86fb5b3dab7a45a..26da667470f07aba95c43542c94f74a74d0676fe 100644
--- a/net/spdy/spdy_stream.h
+++ b/net/spdy/spdy_stream.h
@@ -262,8 +262,8 @@ class NET_EXPORT_PRIVATE SpdyStream {
   // If stream flow control is turned off, this must not be called.
   void IncreaseRecvWindowSize(int32 delta_window_size);
 
-  // Called by OnDataReceived (which is in turn called by the session)
-  // to decrease this stream's receive window size by
+  // Called by OnDataReceived or OnPaddingConsumed (which are in turn called by
+  // the session) to decrease this stream's receive window size by
   // |delta_window_size|, which must be at least 1 and must not cause
   // this stream's receive window size to go negative.
   //
@@ -315,6 +315,10 @@ class NET_EXPORT_PRIVATE SpdyStream {
   //          the stream is being closed.
   void OnDataReceived(scoped_ptr<SpdyBuffer> buffer);
 
+  // Called by the SpdySession when padding is consumed to allow for the stream
+  // receiving window to be updated.
+  void OnPaddingConsumed(size_t len);
+
   // Called by the SpdySession when a frame has been successfully and
   // completely written. |frame_size| is the total size of the frame
   // in bytes, including framing overhead.