[Cronet] Coalesce small buffers into single QUIC packet in GRPC on iOS.

components/cronet/ios/cronet_c_for_grpc.cc

 // Copyright 2016 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 "components/cronet/ios/cronet_c_for_grpc.h"
 
 #include <stdbool.h>
 
 #include <memory>
 #include <string>
@@ skipping 200 matching lines @@
     void* annotation,
     cronet_bidirectional_stream_callback* callback) {
   // Allocate C |stream| object.
   cronet_bidirectional_stream* stream = new cronet_bidirectional_stream();
   // Allocate new C++ adapter that will invoke |callback|.
   stream->obj = new CronetBidirectionalStreamAdapter(engine, stream, callback);
   stream->annotation = annotation;
   return stream;
 }
 
+int cronet_bidirectional_stream_destroy(cronet_bidirectional_stream* stream) {
+  CronetBidirectionalStreamAdapter::DestroyAdapterForStream(stream);
+  delete stream;
+  return 1;
+}
+
+int cronet_bidirectional_stream_disable_auto_flush(
+    cronet_bidirectional_stream* stream,
+    bool disable_auto_flush) {
+  CronetBidirectionalStreamAdapter::GetCronetStream(stream)->disable_auto_flush(
+      disable_auto_flush);
+  return 1;
+}
+
+int cronet_bidirectional_stream_delay_request_headers_until_flush(
+    cronet_bidirectional_stream* stream,
+    bool delay_headers_until_flush) {
+  CronetBidirectionalStreamAdapter::GetCronetStream(stream)
+      ->delay_headers_until_flush(delay_headers_until_flush);
+  return 1;
+}
+
 int cronet_bidirectional_stream_start(
     cronet_bidirectional_stream* stream,
     const char* url,
     int priority,
     const char* method,
     const cronet_bidirectional_stream_header_array* headers,
     bool end_of_stream) {
   cronet::CronetBidirectionalStream* cronet_stream =
       CronetBidirectionalStreamAdapter::GetCronetStream(stream);
   net::HttpRequestHeaders request_headers;
@@ skipping 21 matching lines @@
 }
 
 int cronet_bidirectional_stream_write(cronet_bidirectional_stream* stream,
                                       const char* buffer,
                                       int count,
                                       bool end_of_stream) {
   return CronetBidirectionalStreamAdapter::GetCronetStream(stream)->WriteData(
       buffer, count, end_of_stream);
 }
 
+int cronet_bidirectional_stream_flush(cronet_bidirectional_stream* stream) {
+  return CronetBidirectionalStreamAdapter::GetCronetStream(stream)->Flush();
+}
+
 int cronet_bidirectional_stream_cancel(cronet_bidirectional_stream* stream) {
   CronetBidirectionalStreamAdapter::GetCronetStream(stream)->Cancel();
   return 1;
 }
-
-int cronet_bidirectional_stream_destroy(cronet_bidirectional_stream* stream) {
-  CronetBidirectionalStreamAdapter::DestroyAdapterForStream(stream);
-  delete stream;
-  return 1;
-}