Remaining Linux crashes and nits for 54

[posix4e]

-- Crashes these are blockers
[ ] When trying to use the local password store I get

-- Nits
[ ] Not implemented reached in static bool blink::PlatformKeyboardEvent::currentCapsLockState()
[ ]

Error: Could not call remote function 'isFocused'. Check that the function signature is correct. Underlying error: Object has been destroyed
   at callFunction (/usr/share/brave/resources/electron.asar/browser/rpc-server.js:226:11)
   at EventEmitter.<anonymous> (/usr/share/brave/resources/electron.asar/browser/rpc-server.js:319:5)
   at emitMany (events.js:127:13)
   at EventEmitter.emit (events.js:201:7)
   at WebContents.<anonymous> (/usr/share/brave/resources/electron.asar/browser/api/web-contents.js:181:13)
   at emitTwo (events.js:106:13)
   at WebContents.emit (events.js:191:7)", source: extensions::remote (219)
[5453:5453:1208/095057:ERROR:CONSOLE(219)] "Uncaught Error: Could not call remote function 'isFocused'. Check that the function signature is correct. Underlying error: Object has been destroyed
Error: Could not call remote function 'isFocused'. Check that the function signature is correct. Underlying error: Object has been destroyed
   at callFunction (/usr/share/brave/resources/electron.asar/browser/rpc-server.js:226:11)
   at EventEmitter.<anonymous> (/usr/share/brave/resources/electron.asar/browser/rpc-server.js:319:5)
   at emitMany (events.js:127:13)
   at EventEmitter.emit (events.js:201:7)
   at WebContents.<anonymous> (/usr/share/brave/resources/electron.asar/browser/api/web-contents.js:181:13)
   at emitTwo (events.js:106:13)
   at WebContents.emit (events.js:191:7)", source: extensions::remote (219)
[5453:5453:1208/095226:ERROR:CONSOLE(219)] "Uncaught Error: Could not call remote function 'isFocused'. Check that the function signature is correct. Underlying error: Object has been destroyed
Error: Could not call remote function 'isFocused'. Check that the function signature is correct. Underlying error: Object has been destroyed
   at callFunction (/usr/share/brave/resources/electron.asar/browser/rpc-server.js:226:11)
   at EventEmitter.<anonymous> (/usr/share/brave/resources/electron.asar/browser/rpc-server.js:319:5)
   at emitMany (events.js:127:13)
   at EventEmitter.emit (events.js:201:7)
   at WebContents.<anonymous> (/usr/share/brave/resources/electron.asar/browser/api/web-contents.js:181:13)
   at emitTwo (events.js:106:13)
   at WebContents.emit (events.js:191:7)", source: extensions::remote (219)

[posix4e]

I am going to break these up

[luixxiul]

I labelled QA/no qa needed as there is no commits linked to this.