Mandoline: Fix OOPIF high DPI sizing.

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 35 matching lines @@
   // that the View Manager can return this resource back to the client.
   uint32 id;
   ResourceFormat format;
   uint32 filter;
   Size size;
   MailboxHolder mailbox_holder;
   bool is_repeated;
   bool is_software;
 };
 
+// See cc/output/compositor_frame_metadata.h.
+struct CompositorFrameMetadata {
+  float device_scale_factor;
+};
+
 // See src/cc/output/compositor_frame.h.
 struct CompositorFrame {
+  CompositorFrameMetadata metadata;
   array<TransferableResource> resources;
   array<Pass> passes;
 };
 
 // A Surface 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 Surface {
   // 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) => ();
 };
 
 interface SurfaceClient {
   ReturnResources(array<ReturnedResource> resources);
 };