Remove AutocompleteInput Type and PageClassification.

They are just as same as the enums defined in .proto files. Removing
the declaration of these types reduces unnecessary code dependency
to autocomplete.

BUG=384232
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TEST=compile succeeds

Review URL: https://codereview.chromium.org/343523003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278722 0039d316-1c4b-4281-b951-d872f2087c98
50 files changed