Change 9789001: attempt #3 after fixing the problems with linux Created by Wei Li: https://chromium…

Change 9789001: attempt #3 after fixing the problems with linux Created by Wei Li: https://chromiumcodereview.appspot.com/9789001/ Changes to add duration into history database. This completes Issue 9605037 which can compute suggestion sites based on time slicing as well as visit duration. A new database table was added for those new fields we may need to experiment on.

Warning: HistoryBackendTest.MigrationVisitDuration and HistoryProfileTest.TypicalProfileVersion are failing on the bots because of bots inability to update binary files. Once committed everything should be fine.

BUG=none
TEST=unit-tests
TBR=brettw@chromium.org,weili@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=131473