GitLab

Have TabAndroid to implement the SearchTabHelperDelegate interface to provide the necessary functionality to SearchTabHelper.

This will allow us to turn off search term replacement (by updating the location bar displayed url) when the underlying page doesn't support embedded search.

Server side bug: b/17140979

BUG=none
TEST=none

Review URL: https://codereview.chromium.org/488093003

Cr-Commit-Position: refs/heads/master@{#291603}