GpuDisplayCompositorFrameSink => GpuRootCompositorFrameSink

cc/ipc/display_compositor.mojom

Index: cc/ipc/display_compositor.mojom
diff --git a/cc/ipc/display_compositor.mojom b/cc/ipc/display_compositor.mojom
index bd0e942844edfe09cbbf536c53f06dcdc64c16a4..52b688aafd62cd930c54aa99de03ad63e015d645 100644
--- a/cc/ipc/display_compositor.mojom
+++ b/cc/ipc/display_compositor.mojom
@@ -40,8 +40,8 @@ interface DisplayPrivate {
 interface DisplayCompositor {
   // Create a CompositorFrameSink for a privileged client (e.g. WindowServer).
   // This is only used by privileged clients. The client can call methods that
-  // talks to the cc::Display (e.g. ResizeDisplay(), SetDisplayVisible(), etc)
-  CreateDisplayCompositorFrameSink(
+  // talks to the Display (e.g. ResizeDisplay(), SetDisplayVisible(), etc)
+  CreateRootCompositorFrameSink(
       cc.mojom.FrameSinkId frame_sink_id,
       gpu.mojom.SurfaceHandle widget,
       associated cc.mojom.MojoCompositorFrameSink& compositor_frame_sink,
@@ -49,10 +49,10 @@ interface DisplayCompositor {
       cc.mojom.MojoCompositorFrameSinkClient compositor_frame_sink_client,
       associated DisplayPrivate& display_private);
 
-  // CreateOffscreenCompositorFrameSink is used by unprivileged clients.
-  // An off screen CompositorFrameSink only submits frames to a buffer instead
-  // of a display.
-  CreateOffscreenCompositorFrameSink(
+  // CreateCompositorFrameSink is used by unprivileged clients.
+  // This CompositorFrameSink is not a root, and has to be parented by another
+  // CompositorFrameSink in order to appear on screen.
+  CreateCompositorFrameSink(
       cc.mojom.FrameSinkId frame_sink_id,
       cc.mojom.MojoCompositorFrameSink& compositor_frame_sink,
       cc.mojom.MojoCompositorFrameSinkPrivate& compositor_frame_sink_private,