[cc] Add and plumb CFS::DidNotProduceFrame.

cc/ipc/mojo_compositor_frame_sink.mojom

 // Copyright 2016 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 cc.mojom;
 
 import "cc/ipc/begin_frame_args.mojom";
 import "cc/ipc/compositor_frame.mojom";
 import "cc/ipc/copy_output_request.mojom";
 import "cc/ipc/frame_sink_id.mojom";
@@ skipping 19 matching lines @@
   // surface (e.g. during resize), then it can simply allocate a new
   // |local_surface_id|.
   // For successful swaps, the implementation must call
   // DidReceiveCompositorFrameAck() asynchronously when the frame has been
   // processed in order to unthrottle the next frame.
   SubmitCompositorFrame(cc.mojom.LocalSurfaceId local_surface_id,
                         cc.mojom.CompositorFrame frame);
 
   // Notifies the frame sink that a BeginFrame was completed, but that no
   // CompositorFrame was produced as a result of it.
-  BeginFrameDidNotSwap(cc.mojom.BeginFrameAck ack);
+  BeginFrameDidNotProduceFrame(cc.mojom.BeginFrameAck ack);

[sunnyps, 2017/05/22 07:17:12]

nit: My suggestion was DidNotProduceFrame (skipping the redundant BeginFrame
IMO) but I don't care too much about the name.

[Eric Seckler, 2017/05/22 11:29:58]

Ah, misunderstood. Renamed, I like it shorter, too.

 
   // Notify that the surface is no longer in use (and is okay to be evicted) so
   // that its resources gets returned in time.
   EvictCurrentSurface();
 };
 
 interface MojoCompositorFrameSinkClient {
   // Notification that the previous CompositorFrame given to
   // SubmitCompositorFrame() has been processed and that another frame
   // can be submitted. This provides backpressure from the display compositor
@@ skipping 16 matching lines @@
 interface MojoCompositorFrameSinkPrivate {
   // Claims this FrameSinkId will embed |surface_id| so it should own the
   // temporary reference to |surface_id|.
   ClaimTemporaryReference(SurfaceId surface_id);
 
   // Requests that the renderer send back a copy of the surface that this
   // CompositorFrameSink submits to. The result can be in form of a bitmap
   // or a texture. See cc::CopyOutputRequest.
   RequestCopyOfSurface(cc.mojom.CopyOutputRequest request);
 };