Remove ManagePasswordsBubbleView.

The remaining static code in use moves to PendingView. References are
updated to use ManagePasswordsBubbleDelegateViewBase directly.

Also removes SINGLE_VIEW_COLUMN_SET in favor of using a FillLayout and
cleans up unreferenced ColumnSet enums.

Bug: chromium:654115
Change-Id: I54d6ed26132388bd33c3e93e504ce153146f43ec
Reviewed-on: https://chromium-review.googlesource.com/882161
Commit-Queue: Peter Boström <pbos@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531682}
16 files changed