Code:   TabManagerTest() : scoped_set_tick_clock_for_testing_(&test_clock_) {
     test_clock_.Advance(kShortDelay);
   }

Commit Message: Connect the LocalDB to TabManager.

Bug: 773382
Change-Id: Iec8fe5226ee175105d51f300f30b4865478ac099
Reviewed-on: https://chromium-review.googlesource.com/1118611
Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572871}
CWE ID: 
  TabManagerTest() : scoped_set_tick_clock_for_testing_(&test_clock_) {
     test_clock_.Advance(kShortDelay);
    scoped_feature_list_.InitAndEnableFeature(
        features::kSiteCharacteristicsDatabase);
   }
