Remove TextDatabase from the history service.
The full text indexing feature is no longer used by anything.
- Remove the TextDatabase, TextDatabaseManager and related files.
- Remove is_indexed field from VisitRow objects.
- Modify ExpireHistoryBackend and HistoryBackend to no longer call TextDatabase
- Have HistoryBackend delete the "History Index *" files from the users profile
- Remove ChromeViewHostMsg_PageContents IPC message since the browser process
no longer requires to have the page contents of recently loaded pages.
BUG=247418
TESTS=unit tests, manual testing and run through trybots.
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=212459
Review URL: https://chromiumcodereview.appspot.com/
16951015
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@213442 0039d316-1c4b-4281-b951-d872f2087c98