Part 3/3 (RWH/IOSurface) of adding with device scale factor to transport surfaces

content/common/gpu/image_transport_surface_mac.cc

Index: content/common/gpu/image_transport_surface_mac.cc
diff --git a/content/common/gpu/image_transport_surface_mac.cc b/content/common/gpu/image_transport_surface_mac.cc
index c27e47ae950a03ba167b4e27ebb38dd77b3211d2..6262051ab9d456c46fa8f574b65549e0951f6e3a 100644
--- a/content/common/gpu/image_transport_surface_mac.cc
+++ b/content/common/gpu/image_transport_surface_mac.cc
@@ -233,6 +233,7 @@ bool IOSurfaceImageTransportSurface::SwapBuffers() {
   GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params;
   params.surface_handle = io_surface_handle_;
   params.size = GetSize();
+  params.scale_factor = scale_factor_;
   params.latency_info = latency_info_;
   helper_->SendAcceleratedSurfaceBuffersSwapped(params);
 
@@ -255,6 +256,7 @@ bool IOSurfaceImageTransportSurface::PostSubBuffer(
   params.width = width;
   params.height = height;
   params.surface_size = GetSize();
+  params.surface_scale_factor = scale_factor_;
   params.latency_info = latency_info_;
   helper_->SendAcceleratedSurfacePostSubBuffer(params);