Update usage of getTitleSnippet(), getRedirectSnippet() and getSectionSnippet()

According to I5aae8caf, the parameter is gone now.  Found while
tracking down a strict warning in MWSearch.

Change-Id: I571e015814ea756771c66c243cb8db86448db463
Merge "Update usage of getTitleSnippet(), getRedirectSnippet() and getSectionSnippet()"