Revert of Use trace wrapper in PopStateEvent (patchset #1 id:1 of https://codereview.chromium.org/2850133002/ )

Reason for revert:
Broke builds

Original issue's description:
> Don't store ScriptValue in PopStateEvent
>
> Use TraceWrapperV8Reference instead. This CL doesn't remove
> custom getter of PopStateEvent.state as more work will be
> needed to remove custom bindings.
>
> BUG=501866
>
> Review-Url: https://codereview.chromium.org/2850133002
> Cr-Commit-Position: refs/heads/master@{#468565}
> Committed: https://chromium.googlesource.com/chromium/src/+/77301cfe98de369b7d72659d4a95014f1d4dc4b6

TBR=haraken@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=501866

Review-Url: https://codereview.chromium.org/2856683003
Cr-Commit-Position: refs/heads/master@{#468566}
4 files changed