Examples crash on Mac when app doesn't have permission to write to the debug.log file

[GoogleCodeExporter]

When using preinstalled Python that ships with OS X and after install the 
cefpython3 package there are problems with running examples from the 
/Library/Python/2.6/site-packages/cefpython3/examples directory. App has no 
permission to write to the debug.log file and it results in Python crash with 
"Segmentation fault: 11" error. In the console you can see warnings like this:

    [CEF Python] WARNING: failed writing to debug file: debug.log

These warnings are not the cause of the crash. I think that it is CEF that 
causes the crash when it can't access the debug.log file.

Try this: in the examples check if app has permission to write to debug.log 
file and if not then set the ApplicationSettings.log_file to an empty string.

Original issue reported on code.google.com by czarek.t...@gmail.com on 14 Jan 2015 at 7:00