* perf: remove unnecessary c_str() call when invoking promise.RejectWithErrorMessage()
RejectWithErrorMessage() takes a std::string_view
* perf: remove unnecessary c_str() call when invoking Environment::SetVar()
the val arg to Environment::SetVar() takes a const std::string&
* refactor: use string_view variant of base::UTF8ToWide()
* perf: remove unnecessary c_str() call when instantiating a ScopedHString
ScopedHString has always taken a StringPiece
* refactor: use simpler invocation of base::make_span()
* perf: remove unnecessary c_str() call when calling base::CommandLine::HasSwitch()
HasSwitch() already takes a string_piece
* perf: remove unnecessary c_str() call when calling net::HttpResponseHeaders::AddHeader()
AddHeader() already takes a StringPiece arg
* perf: omit unnecessary str -> wstr -> str conversion in DesktopCapturer::UpdateSourcesList()
this conversion was made redundant by c670e38
b428315c6d