Implement padding for SPDY4/HTTP2 DATA frames.

net/spdy/spdy_session.cc

Index: net/spdy/spdy_session.cc
diff --git a/net/spdy/spdy_session.cc b/net/spdy/spdy_session.cc
index ac30a5276528aef6fce1a85253f0f489927efdb1..f1150eaa3a87214f3b19300373bfd4c8dfedb917 100644
--- a/net/spdy/spdy_session.cc
+++ b/net/spdy/spdy_session.cc
@@ -1910,6 +1910,13 @@ void SpdySession::OnStreamFrameData(SpdyStreamId stream_id,
   if (availability_state_ == STATE_CLOSED)
     return;
 
+  if (data == NULL && len != 0) {
+    // This is notification of consumed data padding.
+    // TODO(jgraettinger): Properly flow padding into WINDOW_UPDATE frames.
+    // See crbug.com/353012.
+    return;
+  }
+
   DCHECK_LT(len, 1u << 24);
   if (net_log().IsLogging()) {
     net_log().AddEvent(