GitLab

Make sure that:
- shebang is only present for executable files
- shebang is #!/usr/bin/env python
- __main__ is only present for executable files
- file's executable bit is coherent

Also fix EOF LF to be only one.

* Do not fix them all at once otherwise the CL would be too large.

TBR=jamiewalch@chromium.org
BUG=105108
TEST=

Review URL: http://codereview.chromium.org/8665013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111427 0039d316-1c4b-4281-b951-d872f2087c98