Mac: Clean up plumbing of accelerated widgets

gpu/ipc/service/image_transport_surface_overlay_mac.mm

Index: gpu/ipc/service/image_transport_surface_overlay_mac.mm
diff --git a/gpu/ipc/service/image_transport_surface_overlay_mac.mm b/gpu/ipc/service/image_transport_surface_overlay_mac.mm
index e8abb3298340d08716617bf0b2f71c7deb9d37ce..3f18b501e50f11f46f3760fc8f63d4b2d85dcb69 100644
--- a/gpu/ipc/service/image_transport_surface_overlay_mac.mm
+++ b/gpu/ipc/service/image_transport_surface_overlay_mac.mm
@@ -59,18 +59,9 @@ void IOSurfaceContextNoOp(scoped_refptr<ui::IOSurfaceContext>) {
 
 namespace gpu {
 
-scoped_refptr<gl::GLSurface> ImageTransportSurfaceCreateNativeSurface(
-    GpuChannelManager* manager,
-    GpuCommandBufferStub* stub,
-    SurfaceHandle handle) {
-  return new ImageTransportSurfaceOverlayMac(stub, handle);
-}
-
 ImageTransportSurfaceOverlayMac::ImageTransportSurfaceOverlayMac(
-    GpuCommandBufferStub* stub,
-    SurfaceHandle handle)
+    GpuCommandBufferStub* stub)
     : stub_(stub->AsWeakPtr()),
-      handle_(handle),
       use_remote_layer_api_(ui::RemoteLayerAPISupported()),
       scale_factor_(1),
       gl_renderer_id_(0) {
@@ -135,7 +126,6 @@ void IOSurfaceContextNoOp(scoped_refptr<ui::IOSurfaceContext>) {
 }
 
 void ImageTransportSurfaceOverlayMac::SendAcceleratedSurfaceBuffersSwapped(
-    gpu::SurfaceHandle surface_handle,
     CAContextID ca_context_id,
     bool fullscreen_low_power_ca_context_valid,
     CAContextID fullscreen_low_power_ca_context_id,
@@ -149,7 +139,6 @@ void IOSurfaceContextNoOp(scoped_refptr<ui::IOSurfaceContext>) {
                        "width", size.width());
 
   GpuCommandBufferMsg_SwapBuffersCompleted_Params params;
-  params.surface_handle = surface_handle;
   params.ca_context_id = ca_context_id;
   params.fullscreen_low_power_ca_context_valid =
       fullscreen_low_power_ca_context_valid;
@@ -277,7 +266,7 @@ void IOSurfaceContextNoOp(scoped_refptr<ui::IOSurfaceContext>) {
       io_surface_mach_port.reset(IOSurfaceCreateMachPort(io_surface));
   }
   SendAcceleratedSurfaceBuffersSwapped(
-      handle_, ca_context_id, fullscreen_low_power_layer_valid,
+      ca_context_id, fullscreen_low_power_layer_valid,
       fullscreen_low_power_ca_context_id, io_surface_mach_port, pixel_size_,
       scale_factor_, std::move(latency_info_));