[v8][wasm] Avoid use of deprecated API

The {WasmCompiledModule::GetWasmWireBytes} method will be deprecated
for M-70.

R=mlippautz@chromium.org

Change-Id: I9038db98a1b2bfd9faa0be68eb756c01a1d55896
Reviewed-on: https://chromium-review.googlesource.com/1150538
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578265}
1 file changed