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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
}
      }
      return false;
    }
    case WM_CONTEXTMENU: {
      bool prevent_default = false;
      NotifyWindowSystemContextMenu(GET_X_LPARAM(l_param),
                                    GET_Y_LPARAM(l_param), &prevent_default);
      return prevent_default;
    }
    default:
      return false;
  }
}
void NativeWindowViews::HandleSizeEvent(WPARAM w_param, LPARAM l_param) {
  
  
  switch (w_param) {
    case SIZE_MAXIMIZED:
    case SIZE_MINIMIZED: {
      WINDOWPLACEMENT wp;
      wp.length = sizeof(WINDOWPLACEMENT);
      if (GetWindowPlacement(GetAcceleratedWidget(), &wp)) {
        last_normal_placement_bounds_ = gfx::Rect(wp.rcNormalPosition);
      }
      
      
      if (w_param == SIZE_MAXIMIZED &&
          last_window_state_ != ui::SHOW_STATE_MAXIMIZED) {
        last_window_state_ = ui::SHOW_STATE_MAXIMIZED;