Mandoline: Allow submitting CompositorFrames directly to mojo::Views

components/view_manager/public/interfaces/compositor_frame.mojom

 // Copyright 2015 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.
 
 module mojo;
 
 import "ui/mojo/geometry/geometry.mojom";
 import "components/view_manager/public/interfaces/quads.mojom";
 
 enum ResourceFormat {
@@ skipping 32 matching lines @@
   MailboxHolder mailbox_holder;
   bool is_repeated;
   bool is_software;
 };
 
 // See src/cc/output/compositor_frame.h.
 struct CompositorFrame {
   array<TransferableResource> resources;
   array<Pass> passes;
 };
+
+// CompositorFrameReceiver is an interface for receiving CompositorFrame
+// structs. This is a separate interface to allow CompositorFrames to be
+// delivered from supplementary (not main) threads of a mojo app.
+interface CompositorFrameReceiver {
+  // After the submitted frame is drawn for the first time, the receiver will
+  // respond to the SubmitFrame message. Clients should use this acknowledgement
+  // to ratelimit frame submissions.
+  SubmitCompositorFrame(CompositorFrame frame) => ();
+};