Use threadSafeBind() in ScriptStreamer
Use threadSafeBind() in ScriptStreamer

This CL replaces bind() used for cross-thread task posting with threadSafeBind().
No behavior changes.

BUG=479068

Review URL: https://codereview.chromium.org/1100813003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@194276 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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