GitLab

- Changed the toasts shown for clipboard blocked pastes
to bubbles according to the new mocks.
- Moved all the clipboard notifications related
functions to dlp_clipboard_notification_helper.h/.cc

Bug: 1148224, 1131670
Change-Id: I69a99b1a99d08cbc6ea47852d3ce6a3a7fdace66
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2532564
Commit-Queue: Aya Elsayed <ayaelattar@chromium.org>
Reviewed-by: Aya Elsayed <ayaelattar@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Reviewed-by: Nikita Podguzov <nikitapodguzov@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829162}