Give BrowserContext subclasses access to GetPath()
Update to latest libchromiumcontent

* vendor/libchromiumcontent fc02d93...f4f8a7e (4):
  > Include encryptor.lib and its symbols and headers in the distribution
  > Build encryptor.lib on Windows
  > Revert all changes before building if any unexpected files are modified
  > Export headers from cc/