SPDY4: SpdySession should send SETTINGS acknowledgements.

net/spdy/spdy_test_util_common.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/spdy/spdy_test_util_common.h"
 
 #include <cstddef>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 846 matching lines @@
        ++it) {
     settings_ir.AddSetting(
         it->first,
         (it->second.first & SETTINGS_FLAG_PLEASE_PERSIST) != 0,
         (it->second.first & SETTINGS_FLAG_PERSISTED) != 0,
         it->second.second);
   }
   return CreateFramer(false)->SerializeFrame(settings_ir);
 }
 
+SpdyFrame* SpdyTestUtil::ConstructSpdySettingsAck() const {
+  char kEmptyWrite[] = "";
+
+  if (spdy_version() > SPDY3) {
+    SpdySettingsIR settings_ir;
+    settings_ir.set_is_ack(true);
+    return CreateFramer(false)->SerializeFrame(settings_ir);
+  }
+  // No settings ACK write occurs. Create an empty placeholder write.
+  return new SpdyFrame(kEmptyWrite, 0, false);
+}
+
 SpdyFrame* SpdyTestUtil::ConstructSpdyPing(uint32 ping_id, bool is_ack) const {
   SpdyPingIR ping_ir(ping_id);
   ping_ir.set_is_ack(is_ack);
   return CreateFramer(false)->SerializeFrame(ping_ir);
 }
 
 SpdyFrame* SpdyTestUtil::ConstructSpdyGoAway() const {
   return ConstructSpdyGoAway(0);
 }
 
@@ skipping 331 matching lines @@
   }
 }
 
 void SpdyTestUtil::SetPriority(RequestPriority priority,
                                SpdySynStreamIR* ir) const {
   ir->set_priority(ConvertRequestPriorityToSpdyPriority(
       priority, spdy_version()));
 }
 
 }  // namespace net