Fix some callsites of AddMarker() in InputMethodControllerTest

This AddMarker() method should really only be used for Spelling and Grammar
markers (I'm going to split it into AddSpellingMarker() and AddGrammarMarker()
in a later CL to eliminate this problem). This CL fixes some test cases that
create TextMatch markers to use AddTextMatchMarker().

BUG=707867

Review-Url: https://codereview.chromium.org/2897103003
Cr-Commit-Position: refs/heads/master@{#474463}
1 file changed