Remove setFooListener() APIs from Platform.
Remove setFooListener() APIs from Platform.

Those methods should no longer be used by the content layer. It should
be using startListening() and stopListening() instead.

Requires https://codereview.chromium.org/421293010/

BUG=400158

Review URL: https://codereview.chromium.org/437163005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@179772 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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