Revert of Send FrameSwapMessageQueue's messages in QueueMessageSwapPromise

content/renderer/gpu/queue_message_swap_promise.cc

Index: content/renderer/gpu/queue_message_swap_promise.cc
diff --git a/content/renderer/gpu/queue_message_swap_promise.cc b/content/renderer/gpu/queue_message_swap_promise.cc
index ffe25471fd0d0b84df592813e25cdc2dd0b2a907..22745027148a6495ee736e551d333ef70fa93520 100644
--- a/content/renderer/gpu/queue_message_swap_promise.cc
+++ b/content/renderer/gpu/queue_message_swap_promise.cc
@@ -5,7 +5,6 @@
 #include "content/renderer/gpu/queue_message_swap_promise.h"
 
 #include "base/command_line.h"
-#include "content/common/view_messages.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/renderer/gpu/frame_swap_message_queue.h"
@@ -49,21 +48,7 @@
   DCHECK(!completed_);
 #endif
   message_queue_->DidSwap(source_frame_number_);
-  {
-    std::unique_ptr<FrameSwapMessageQueue::SendMessageScope>
-        send_message_scope = message_queue_->AcquireSendMessageScope();
-    std::vector<std::unique_ptr<IPC::Message>> messages;
-    message_queue_->DrainMessages(&messages);
-    std::vector<IPC::Message> messages_to_send;
-    FrameSwapMessageQueue::TransferMessages(&messages, &messages_to_send);
-    if (!messages_to_send.empty()) {
-      metadata->frame_token = message_queue_->AllocateFrameToken();
-      message_sender_->Send(new ViewHostMsg_FrameSwapMessages(
-          message_queue_->routing_id(), metadata->frame_token,
-          messages_to_send));
-    }
-    // ~send_message_scope.
-  }
+  // The OutputSurface will take care of the Drain+Send.
   PromiseCompleted();
 }