Fix many* python scripts in src/

Fix many* python scripts in src/

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=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=111427

[M-A Ruel, 2011-11-23 02:55:10]

Context: I'm going to add a presubmit check to enforce some of these rules.

Lucky you, you get all the remaining directories with <5 modified files. :)

[Jamie, 2011-11-23 19:33:50]

Not sure I fully understand the rationale behind adding the shbang and
executable bit to some files, and removing the shbang from others (all
PRESUBMIT.py I think), but LGTM.

[M-A Ruel, 2011-11-23 19:36:35]

On 2011/11/23 19:33:50, Jamie wrote:
> Not sure I fully understand the rationale behind adding the shbang and
> executable bit to some files, and removing the shbang from others (all
> PRESUBMIT.py I think), but LGTM.

I'm sending an email to chromium-dev real soon (tm).

[commit-bot: I haz the power, 2011-11-23 19:45:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/8665013/2001

[commit-bot: I haz the power, 2011-11-23 19:45:43]

Can't apply patch for file chrome_frame/tools/test/page_cycler/cf_cycler.py.
While running patch -p1 --forward --force;
patching file chrome_frame/tools/test/page_cycler/cf_cycler.py
Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- saving rejects to file
chrome_frame/tools/test/page_cycler/cf_cycler.py.rej

[M-A Ruel, 2011-11-23 20:07:27]

On 2011/11/23 19:45:43, I haz the power (commit-bot) wrote:
> Can't apply patch for file chrome_frame/tools/test/page_cycler/cf_cycler.py.

This file is CRLF, I moved this one into http://codereview.chromium.org/8662025/
so I can commit it manually but use the CQ for the rest.

[commit-bot: I haz the power, 2011-11-23 20:09:16]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/8665013/7007

[commit-bot: I haz the power, 2011-11-23 22:22:22]

Change committed as 111427