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### Preflight Checklist
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* [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
* [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
* [x] I have searched the issue tracker for a feature request that matches the one I want to file, without success.

### Problem Description
<!-- Is your feature request related to a problem? Please add a clear and concise description of what the problem is. -->

BrowserWindow currently offers "moved" event related to moving a window, but it only has "will-resize" and "resize" events. I want to save the current dimensions of a window when its size changes, but "will-resize" and "resize" events get fired at every single pixel change. This results in an unnecessarily large number of saving function calls or a need for debouncing the event.

### Proposed Solution
<!-- Describe the solution you'd like in a clear and concise manner -->

Adding "resized" event to BrowserWindow will solve the problem stated above.

### Alternatives Considered
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### Additional Information
<!-- Add any other context about the problem here. -->

shell/browser/native_window_views_win.cc
std::string command = AppCommandToString(command_id);
  NotifyWindowExecuteAppCommand(command);
  return false;
}
bool NativeWindowViews::PreHandleMSG(UINT message,
                                     WPARAM w_param,
                                     LPARAM l_param,
                                     LRESULT* result) {
  NotifyWindowMessage(message, w_param, l_param);
  
  if (is_setting_window_placement_) {
    
    
    
    if (message == WM_NCCALCSIZE)
      return false;
    
    *result = DefWindowProc(GetAcceleratedWidget(), message, w_param, l_param);
    
    return true;
  }
  switch (message) {
    
    
    
    
    
    case WM_GETOBJECT: {
      if (checked_for_a11y_support_)
        return false;