The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4c6e7e4b353385a58513fca720666c75269f8900

commit 4c6e7e4b353385a58513fca720666c75269f8900
Author: Alexey Kozyatinskiy <kozyatinskiy@chromium.org>
Date: Mon Mar 05 21:10:42 2018

Revert "[DevTools] copyBreakpoints should not remove breakpoint from storage"

Original CL makes breakpoints not removable from not mapped FS UISourceCodes.
Original CL: https://chromium-review.googlesource.com/c/chromium/src/+/902327

R=dgozman@chromium.org

Bug:  chromium:818763 
Change-Id: I63be06287545271679b6f8248585ddae422631a9
Reviewed-on: https://chromium-review.googlesource.com/949454
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540935}
[modify] https://crrev.com/4c6e7e4b353385a58513fca720666c75269f8900/third_party/WebKit/Source/devtools/front_end/persistence/Persistence.js

Please add affected OSs.

This bug requires manual review: Reverts referenced in bugdroid comments after merge request.
Please contact the milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), josafat@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

All OS affected since all of them shared the same DevTools frontend code.

Tested the issue using #67.0.3364.0 on Mac 10.13.3 as per the steps mentioned in original comment.

@kozy: Could you please find the attached video and confirm about the Fix.

Thanks!!

Deleted: 818763.mp4 10.1 MB

	818763.mp4 10.1 MB View Download

kozy@, ptal comment #6 and also let us know how is the revert listed at #1 looking in canary? If all looks good, I can approve merge to M66. Thank you.

kozy@, could you ptal comment #7 pls and update the bug?

Please merge this change as soon as possible

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

kozy@, reminder to please merge to M66 branch 3359 asap.

Please merge this today!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7ca6bc31cfcdb34f2bb48f3abb2866eced13a8f0

commit 7ca6bc31cfcdb34f2bb48f3abb2866eced13a8f0
Author: Alexey Kozyatinskiy <kozyatinskiy@chromium.org>
Date: Thu Mar 29 18:22:55 2018

Revert "[DevTools] copyBreakpoints should not remove breakpoint from storage"

Original CL makes breakpoints not removable from not mapped FS UISourceCodes.
Original CL: https://chromium-review.googlesource.com/c/chromium/src/+/902327

R=dgozman@chromium.org
TBR=kozyatinskiy@chromium.org

(cherry picked from commit 4c6e7e4b353385a58513fca720666c75269f8900)

Bug:  chromium:818763 
Change-Id: I63be06287545271679b6f8248585ddae422631a9
Reviewed-on: https://chromium-review.googlesource.com/949454
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#540935}
Reviewed-on: https://chromium-review.googlesource.com/985910
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/branch-heads/3359@{#498}
Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}
[modify] https://crrev.com/7ca6bc31cfcdb34f2bb48f3abb2866eced13a8f0/third_party/WebKit/Source/devtools/front_end/persistence/Persistence.js

Tested the issue on latest chrome Beta# 66.0.3359.81 using Mac 10.12.6 with steps mentioned below:
1) Launched chrome reported version, opened one website and added workspace to it in Devtools > Sources > Filesystem and set the breakpoint to it
2) Opened another website and opened script with breakpoint
3) Removed the breakpoint and reloaded the page, breakpoint didn't appeared again

@kozy: Please find the attached screen cast for your reference and help in verifying the fix.

Thanks!

Deleted: 818763.mp4 5.8 MB

	818763.mp4 5.8 MB View Download