Tested the issue in Android and able to reproduce the issue. 

Steps Followed:
1. Opened chrome and pasted Number(10).toLocaleString("en-GB",  {style: "currency", currency: "GBP"}); in console
2. Observed output as GBP10.00 instead of £10.00

Chrome versions tested:
68.0.3440.85, 70.0.3415.4

OS:
Android 9.0

Android Devices:
Pixel 2 XL

Issue is seen in latest stable and latest canary.

Using the per-revision bisect providing the bisect results,
Good Build - 68.0.3423.0
Bad Build - 68.0.3425.0 

CL: https://chromium.googlesource.com/chromium/src/+/359c346836e261c50fb4d3168f5e0a3ce4edb436

@ jshin: Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to owner concerned. Adding RB-Stable for M-68, Please remove if this not the case. 

Please navigate to below link for log's  --
go/chrome-androidlogs/870338

Thanks!

 Issue 872215  has been merged into this issue.

Recently regressed, please have a fix before M70 hits stable.

Hi, could I clarify what this means in terms of an expected timeline for a fix? 

We are considering whether we need to put something in place to work around the issue until the fix lands, so it would be useful to know roughly how long that might be.

Thanks!

#6 - if this is indeed fixed in Chrome 70 (it is currently not fixed), then it will be released in about 12 weeks.

This is not a release blocker, not sure why this was added. Removing label.

Desktop is fine. So, the ICU data for Android has an issue. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/deps/icu.git/+/a191af9d025859e8368b8b469120d78006e9f5f6

commit a191af9d025859e8368b8b469120d78006e9f5f6
Author: Jungshik Shin <jshin@chromium.org>
Date: Wed Aug 22 06:57:36 2018

Fix ICU data file for Android

In some locales, currency data turns empty after currency list filtering
on Android. This leads v8's currency formatter to fall back to 3-letter
currency code instead of currency symbol (e.g. 'GBP' in en-GB).

Fix the ICU data trimming script to remove an empty Currency block after
filtering and rebuild ICU data files.

Bug:  870338 
Test: See the bug
TBR=gsathya@chromium.org
Change-Id: Idf7af0a5f00b05b7f26d2ad42b21abd1aca47d07
Reviewed-on: https://chromium-review.googlesource.com/1184505
Reviewed-by: Jungshik Shin <jshin@chromium.org>

[modify] https://crrev.com/a191af9d025859e8368b8b469120d78006e9f5f6/android/icudtl.dat
[modify] https://crrev.com/a191af9d025859e8368b8b469120d78006e9f5f6/cast/icudtl.dat
[modify] https://crrev.com/a191af9d025859e8368b8b469120d78006e9f5f6/cast/patch_locale.sh
[modify] https://crrev.com/a191af9d025859e8368b8b469120d78006e9f5f6/common/icudtb.dat
[modify] https://crrev.com/a191af9d025859e8368b8b469120d78006e9f5f6/common/icudtl.dat
[modify] https://crrev.com/a191af9d025859e8368b8b469120d78006e9f5f6/ios/icudtl.dat

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9fa9364c9aab685f22490b2035012a56a9fcebc3

commit 9fa9364c9aab685f22490b2035012a56a9fcebc3
Author: Jungshik Shin <jshin@chromium.org>
Date: Wed Aug 22 22:54:18 2018

Roll ICU to a191af9d

This roll has only one change as recorded in
     https://chromium.googlesource.com/chromium/deps/icu/+/a191af9d .

TBR=gsathya@chromium.org

Bug: chromium: 870338
Test: See the bug
Change-Id: Iceaa255ede13ef3f9e94fdcf6ab74268c1940427
Reviewed-on: https://chromium-review.googlesource.com/1184508
Reviewed-by: Jungshik Shin <jshin@chromium.org>
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585291}
[modify] https://crrev.com/9fa9364c9aab685f22490b2035012a56a9fcebc3/DEPS

This is fixed now in ToT for M70. 

A fix is trivial (requires only ICU deps roll). After baking in trunk for a while, ICU deps roll can be cherry-picked for M69. 

For M68, it's too late. I don't think there will be any more release in M68 branch before M69 turns stable. 

Verified in 70.x canary on Android. 

I missed 69 stable cut by 3 days. 69 stable release is still a few days away. Trying it for M-69 (maybe 2nd stable release of 69 branch). 

This bug requires manual review: We are only 3 days from stable.
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), kariahda@(iOS), cindyb@(ChromeOS), govind@(Desktop)

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

Approved for merge into 69, branch 3497.

It's merged. DOn't know why bugdroid hasn't recorded it here, yet.

https://chromium-review.googlesource.com/c/chromium/src/+/1208250

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8a7148be5419aea65accc3bb2108b2518d51e1b5

commit 8a7148be5419aea65accc3bb2108b2518d51e1b5
Author: Jungshik Shin <jshin@chromium.org>
Date: Wed Sep 05 18:46:10 2018

[M69 branch] Roll ICU to a191af9d

This roll has only one change as recorded in
     https://chromium.googlesource.com/chromium/deps/icu/+/a191af9d .

This is to fix the currency format with GB Pound in en-GB locale on
Android.

TBR=gsathya@chromium.org,benmason@chromium.org

Bug:  chromium:870338 
Test: See the bug
Change-Id: Iceaa255ede13ef3f9e94fdcf6ab74268c1940427
Reviewed-on: https://chromium-review.googlesource.com/1184508
Reviewed-by: Jungshik Shin <jshin@chromium.org>
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#585291}(cherry picked from commit 9fa9364c9aab685f22490b2035012a56a9fcebc3)
Reviewed-on: https://chromium-review.googlesource.com/1208250
Cr-Commit-Position: refs/branch-heads/3497@{#880}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/8a7148be5419aea65accc3bb2108b2518d51e1b5/DEPS