Fix crash when brave action button is clicked with extension-toolbar-menu (uplift to 1.1.x)

[brave-builds]

Uplift of #4065
Fixes brave/brave-browser#5646

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[kjozwiak]

Restarting macOS due to https://ci.brave.com/job/brave-browser-build-pr/job/pr4065_fix-5646_1.1.x/1/execution/node/673/log/:

02:47:49  [43376:775:1128/024715.703404:ERROR:notifications.cc(289)] Failed to load notifications state, resetting to default values
02:47:49  [43376:775:1128/024715.842866:ERROR:ads_serve.cc(89)] Failed to download catalog from:
02:47:49    url: https://ads-serve.brave.com/v1/catalog
02:47:49    response_status_code: -1
02:47:49    response: 
02:47:49    headers: 
02:47:49  [43370:775:1128/024717.367905:ERROR:brave_referrals_service.cc(213)] Failed to fetch headers from referral server, error: -102, response code: -1, payload: , url: https://laptop-updates.brave.com/promo/custom-headers
02:47:49  [43370:775:1128/024717.368229:ERROR:brave_referrals_service.cc(241)] Failed to initialize referral, error: -102, response code: -1, payload: , url: https://laptop-updates.brave.com/promo/initialize/nonua
02:47:49  ../../brave/components/brave_rewards/browser/rewards_service_browsertest.cc:918: Failure
02:47:49  Expected: (js_result.ExtractString().find("" + amount_str + ".0 BAT")) != (std::string::npos), actual: 18446744073709551615 vs 18446744073709551615

[kjozwiak]

Restarting macOS again due to https://ci.brave.com/job/brave-browser-build-pr/job/pr4065_fix-5646_1.1.x/2/execution/node/430/log/.

[kjozwiak]

@simonhong @bsclifton mind taking a look at this one? Looks like it keeps failing on macOS at the same spot. #4095 passed without any issues under 1.2.x after a restart.

[simonhong]

Hmm, errors seems not related with this PR.
Rebased onto latest 1.1.x and restarted.

[simonhong]

@kjozwiak Passed 🎉

[kjozwiak]

Uplift into 1.1.x denied after deliberating with @brave/uplift-approvers. Because this only happens if a user enables extensions-toolbar-menu via brave://flags, it only affects a small percentage of users. Because it's a feature that we currently don't support, we can just allow this to ride the trains. If Chromium decides to enable this by default, we can revisit if it hasn't made it into the Release channel.

After speaking with @bsclifton, going to label brave/brave-browser#5646 as P3 instead of P2.