Quoting from a CL comment by dimich@: 
"""
Instead of adding this method to the HomepageClient, I'd make it a member method of MostVisitedSites (a sibling of InitiateNotificationForNewTiles(), where it is used).

This way, HomepageClient always would have only one 'direction' of info flow (from Java HomepageManager into cc side) and it'll make it simpler for subsequent reading/understanding.

""

With offline discussion, we decided to do it later to make HomepageClient only have one-way information flow (from Java to native) and probably splitting the QueryHomepageTitle out to another interface used between components/ and chrome/browser/.