Send FrameSwapMessageQueue's messages in QueueMessageSwapPromise

content/renderer/gpu/frame_swap_message_queue.h

Index: content/renderer/gpu/frame_swap_message_queue.h
diff --git a/content/renderer/gpu/frame_swap_message_queue.h b/content/renderer/gpu/frame_swap_message_queue.h
index 0b9e1c14a01dd50c8e3d950c837d0d3f365499bc..e9de89a7f3c2812752265780256fe13f8077ebc2 100644
--- a/content/renderer/gpu/frame_swap_message_queue.h
+++ b/content/renderer/gpu/frame_swap_message_queue.h
@@ -37,7 +37,7 @@ class CONTENT_EXPORT FrameSwapMessageQueue
     virtual ~SendMessageScope() {}
   };
 
-  FrameSwapMessageQueue();
+  explicit FrameSwapMessageQueue(int32_t routing_id);
 
   // Queues message to be returned on a matching DrainMessages call.
   //
@@ -98,6 +98,8 @@ class CONTENT_EXPORT FrameSwapMessageQueue
 
   uint32_t AllocateFrameToken();
 
+  int32_t routing_id() const { return routing_id_; }
+
  private:
   friend class base::RefCountedThreadSafe<FrameSwapMessageQueue>;
 
@@ -110,6 +112,7 @@ class CONTENT_EXPORT FrameSwapMessageQueue
   std::unique_ptr<FrameSwapMessageSubQueue> swap_queue_;
   std::vector<std::unique_ptr<IPC::Message>> next_drain_messages_;
   uint32_t last_used_frame_token_ = 0;
+  int32_t routing_id_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(FrameSwapMessageQueue);
 };