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browserAction and pageAction methods take a tabId as parameter.
An extension cannot ensure that the tabId is valid, since the tab might
be removed between the invocation and the handling of the API method.
To suppress the error, extensions need to be able to access the
`chrome.runtime.lastError` object in the callback, which means that
all extension action API methods need to accept an optional callback.

BUG=451320

Change-Id: I4bd1fe8b17bdb98da7b33a03ec814294d5860da1
Reviewed-on: https://chromium-review.googlesource.com/979451Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Rob Wu <rob@robwu.nl>
Cr-Commit-Position: refs/heads/master@{#545797}