Ignore persisent settings on SPDY4.

SpdySession::SendInitialData() now only retrieves and sends server-persisted
SPDY settings for SPDY/3.1 and below.

BUG=408348

Review URL: https://codereview.chromium.org/515353002

Cr-Commit-Position: refs/heads/master@{#292972}

net/spdy/spdy_session.cc

@@ -2735,6 +2735,7 @@ void SpdySession::SendInitialData() {
         kDefaultInitialRecvWindowSize - session_recv_window_size_);
   }
 
+  if (protocol_ <= kProtoSPDY31) {
     // Finally, notify the server about the settings they have
     // previously told us to use when communicating with them (after
     // applying them).
@@ -2756,6 +2757,7 @@ void SpdySession::SendInitialData() {
     }
 
     SendSettings(server_settings_map);
+  }
 }
 
 

net/spdy/spdy_session_unittest.cc

@@ -1576,7 +1576,9 @@ TEST_P(SpdySessionTest, SendInitialDataOnNewSession) {
                             initial_max_concurrent_streams);
   scoped_ptr<SpdyFrame> server_settings_frame(
       spdy_util_.ConstructSpdySettings(server_settings));
+  if (GetParam() <= kProtoSPDY31) {
     writes.push_back(CreateMockWrite(*server_settings_frame));
+  }
 
   session_deps_.stream_initial_recv_window_size = kInitialRecvWindowSize;