Additional fix for rounding overlay display_rect to integers

This change: https://codereview.chromium.org/1110813002/ was missing a
key step - after an ozone platform validator has rounded display_rect
to integer coordinates, that data needs passing back through to the
compositor overlay candidate data - otherwise the assert is still fired.

BUG=

Review URL: https://codereview.chromium.org/1133953002

Cr-Commit-Position: refs/heads/master@{#329210}

content/browser/compositor/browser_compositor_overlay_candidate_validator_ozone.cc

@@ -64,6 +64,7 @@ void BrowserCompositorOverlayCandidateValidatorOzone::CheckOverlaySupport(
 
   for (size_t i = 0; i < surfaces->size(); i++) {
     surfaces->at(i).overlay_handled = ozone_surface_list.at(i).overlay_handled;
+    surfaces->at(i).display_rect = ozone_surface_list.at(i).display_rect;
   }
 }