angler-fishThe Vulnerability History Project

extensions: Use V8 Maybe APIs in NativeHandler

      Also make NativeHandler::NewInstance() return MaybeLocal<Object>
because it can fail while running V8 APIs.

BUG=479065

Review URL: https://codereview.chromium.org/1192763002

Cr-Commit-Position: refs/heads/master@{#336302}
    
commit 61ca3c7b545104ac3edda633a80a62808d281b23
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