blink_gc_plugin: Check for untraced TraceWrapperMember and TraceWrapperV8References

Adds checks for untraced TraceWrapperMember and TraceWrapperV8References

Bug: 910023
Change-Id: Iec646a8e51d117d6469e1587062fc0862858112a
Reviewed-on: https://chromium-review.googlesource.com/c/1356442
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Keishi Hattori <keishi@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#613429}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 9ccf3fba7dff006ad5f75d5d87c8066a7c58e076
9 files changed