The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9351954662a74709359352a8629d340d2a114777

commit 9351954662a74709359352a8629d340d2a114777
Author: georgesak <georgesak@chromium.org>
Date: Mon May 16 22:04:32 2016

[TabManager] Fix discard only once regression.

BUG=525216, 612256 

Review-Url: https://codereview.chromium.org/1980143002
Cr-Commit-Position: refs/heads/master@{#393948}

[modify] https://crrev.com/9351954662a74709359352a8629d340d2a114777/chrome/browser/memory/tab_manager.cc

We are requesting merging to both Stable & Beta as this regression is significant and the fix is very small.

M50 stable is pretty much done, no further stable refresh is planned at this point. 

Before we approve merge to M51, Could you please confirm whether this bug is baked/verified in Canary and safe to merge?

[Automated comment] Less than 2 weeks to go before stable on M51, manual review required.

[Automated comment] Request affecting a post-stable build (M50), manual review required.

[Automated comment] Request affecting a post-stable build (M50), manual review required.

Before we approve merge to M51, Could you please confirm whether this bug is baked/verified in Canary and safe to merge?

I just manually verified and can confirm the regression is gone:

- On Stable (50.0.2661.102), regression is present
- On Canary (52.0.2740.0), regression is gone

Thank you georgesak@.  Approving merge to M51 branch 2704 based on comment #8. Please merge ASAP as we're very close to M51 stable candidate cut. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ab7b1bc781d2510f6848263fce6725bee5a38d03

commit ab7b1bc781d2510f6848263fce6725bee5a38d03
Author: Georges Khalil <georgesak@chromium.org>
Date: Wed May 18 22:00:43 2016

[TabManager] Fix discard only once regression.

TBR=chrisha
BUG=525216, 612256 

Review-Url: https://codereview.chromium.org/1980143002
Cr-Commit-Position: refs/heads/master@{#393948}
(cherry picked from commit 9351954662a74709359352a8629d340d2a114777)

Review URL: https://codereview.chromium.org/1997463002 .

Cr-Commit-Position: refs/branch-heads/2704@{#590}
Cr-Branched-From: 6e53600def8f60d8c632fadc70d7c1939ccea347-refs/heads/master@{#386251}

[modify] https://crrev.com/ab7b1bc781d2510f6848263fce6725bee5a38d03/chrome/browser/memory/tab_manager.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e932f6660251e72cbf3b712be6ac28a9e00c11f0

commit e932f6660251e72cbf3b712be6ac28a9e00c11f0
Author: andersoncss <andersoncss@google.com>
Date: Wed May 25 19:26:26 2016

[TabManager] Unit tests to make sure of the number of times tabs can be discarded.

BUG= 612435 , 612256 

Review-Url: https://codereview.chromium.org/2000833002
Cr-Commit-Position: refs/heads/master@{#395960}

[modify] https://crrev.com/e932f6660251e72cbf3b712be6ac28a9e00c11f0/chrome/browser/memory/tab_manager.h
[modify] https://crrev.com/e932f6660251e72cbf3b712be6ac28a9e00c11f0/chrome/browser/memory/tab_manager_unittest.cc