ElectronBrowserMainParts wakes up every minute even if everything is idle

[ckerr]

Found while investigating #25021

ElectronBrowserMainParts has a periodic timer that is used to trigger GC once a minute even on an idle system. While one wakeup per minute isn't bad, it's also been in there since 2014 and may or may not still be necessary. It might be worth seeing what happens to memory overhead if this is disabled and/or triggered with a different mechanism.

  // Start idle gc.
  gc_timer_.Start(
      FROM_HERE, base::TimeDelta::FromMinutes(1),
      base::Bind(&v8::Isolate::LowMemoryNotification,
                 base::Unretained(js_env_->isolate())));

[nornagon]

I'd support a PR that removes this, I don't think it's needed.

[zcbenz]

I'm good removing the idle GC, there has actually been no measurement whether it would be good for memory usage.