Remote frames not farbling user agent properly

[pilgrim-brave]

noted in #9190 (comment)

[pilgrim-brave]

example from https://dev-pages.bravesoftware.com/farbling.html (all hash values in User Agent row should match)

[srirambv]

@pilgrim-brave can you please add OS labels to the issue

[LaurenWags]

Verified passed with

Brave | 1.17.55 Chromium: 86.0.4240.111 (Official Build) dev (x86_64)
-- | --
Revision | b8c36128a06ebad76af51591bfec980224db5522-refs/branch-heads/4240@{#1290}
OS | macOS Version 10.14.6 (Build 18G6032)

Verified #12020 (comment)

Logged follow up issue #12392 for the "Worker" column not matching the other values in that row.

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Verification passed on

Brave	1.17.59 Chromium: 86.0.4240.183 (Official Build) dev (64-bit)
Revision	0b568b034b8f7994697cb341eeca5979b84151cc-refs/branch-heads/4240@{#1374}
OS	Ubuntu 18.04 LTS

Verified #12020 (comment)

In strict mode:

Encountered #12392

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Verification passed on

Brave	1.17.62 Chromium: 86.0.4240.185 (Official Build) dev (64-bit)
Revision	37e6f852ed18086458552039ad26421aa9fc7acc-refs/branch-heads/4240@{#1377}
OS	Windows 7 Service Pack 1 (Build 7601.24544)

Verified #12020 (comment)

In strict mode:

Encountered #12392

[srirambv]

Verification passed on Samsung Tab A with Android 10 running 1.17.66 x64 beta build

• Verified steps from Remote frames not farbling user agent properly #12020 (comment)

• Encountered Workers not farbling user agent properly - follow up to 12097 #12392

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Verification passed on OnePlus 6T with Android 10 running 1.17.66 x64 beta build

• Verified steps from Remote frames not farbling user agent properly #12020 (comment)