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Ref #19447

### Issue Details

* **Electron Version:**
  * 9.0.0-beta.24
* **Operating System:**
  * macOS 10.15, Windows 10
* **Last Known Working Electron version:**
  * none

### Expected Behavior
`e.sender` object received from an extension background page should have `webPreferences` and `session` initialized. It looks like `options` in `api::WebContents` constructor don't get initialized properly for an extension background page.

### Actual Behavior
`e.sender` object doesn't have `session` and `e.sender.getWebPreferences()` returns `null`.

### To Reproduce
https://github.com/sentialx/electron-quick-start/tree/extensions/no-session

Just run it and you will see something like this:
![image](https://user-images.githubusercontent.com/11065386/82097607-82994400-9703-11ea-8291-0eb987d8aca0.png)

### Additional Information
This is a real blocker for anyone who would want to provide own `chrome` APIs in background pages initialized from different sessions.
shell/browser/api/electron_api_web_contents.cc
static_cast<int>(printing::PrinterType::kLocal));
  settings.SetBoolKey(printing::kSettingShouldPrintSelectionOnly, false);
  settings.SetBoolKey(printing::kSettingRasterizePdf, false);
   Set custom page ranges to print
  std::vector<gin_helper::Dictionary> page_ranges;
  if (options.Get("pageRanges", &page_ranges)) {
    base::Value page_range_list(base::Value::Type::LIST);
    for (auto& range : page_ranges) {
      int from, to;
      if (range.Get("from", &from) && range.Get("to", &to)) {
        base::Value range(base::Value::Type::DICTIONARY);
        range.SetIntKey(printing::kSettingPageRangeFrom, from);
        range.SetIntKey(printing::kSettingPageRangeTo, to);
        page_range_list.Append(std::move(range));
      } else {
        continue;
      }
    }
    if (page_range_list.GetList().size() > 0)
      settings.SetPath(printing::kSettingPageRange, std::move(page_range_list));
  }
   Duplex type user wants to use.
  printing::mojom::DuplexMode duplex_mode;
  options.Get("duplexMode", &duplex_mode);
  settings.SetIntKey(printing::kSettingDuplexMode,
                     static_cast<int>(duplex_mode));
   We've already done necessary parameter sanitization at the
   JS level, so we can simply pass this through.
  base::Value media_size(base::Value::Type::DICTIONARY);
  if (options.Get("mediaSize", &media_size))