Coalesce small buffers in net::BidirectionalStream

components/cronet/ios/cronet_c_for_grpc.cc

Index: components/cronet/ios/cronet_c_for_grpc.cc
diff --git a/components/cronet/ios/cronet_c_for_grpc.cc b/components/cronet/ios/cronet_c_for_grpc.cc
index de84d0f5cfea660a59604a7839c4a590ba574a91..f0d2df6c3d302edc5da63d43ccb49d8bc4ee4418 100644
--- a/components/cronet/ios/cronet_c_for_grpc.cc
+++ b/components/cronet/ios/cronet_c_for_grpc.cc
@@ -77,7 +77,7 @@ class CronetBidirectionalStreamAdapter
 
   virtual ~CronetBidirectionalStreamAdapter();
 
-  void OnHeadersSent() override;
+  void OnStreamReady() override;
 
   void OnHeadersReceived(const net::SpdyHeaderBlock& headers_block,
                          const char* negotiated_protocol) override;
@@ -125,9 +125,9 @@ CronetBidirectionalStreamAdapter::CronetBidirectionalStreamAdapter(
 
 CronetBidirectionalStreamAdapter::~CronetBidirectionalStreamAdapter() {}
 
-void CronetBidirectionalStreamAdapter::OnHeadersSent() {
+void CronetBidirectionalStreamAdapter::OnStreamReady() {
   DCHECK(callback_->on_response_headers_received);
-  callback_->on_request_headers_sent(stream_);
+  callback_->on_stream_ready(stream_);
 }
 
 void CronetBidirectionalStreamAdapter::OnHeadersReceived(