Fix handling of spaces with paths in copy_test_data.py

Fix handling of spaces with paths in copy_test_data.py

This allows copying files with spaces in the paths (most notably,
profiles, which have a number of files containing spaces).

There are two fixes:
- Input/output lists \-escape spaces so that gyp will convert the output back into a list correctly.
- The argument list is no longer parsed by spaces, and the gyp call instead passes the input list as a list of separate arguments instead of one giant string.

BUG=None


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=166931

[rohitrao (ping after 24h), 2012-11-09 15:54:09]

lgtm

[commit-bot: I haz the power, 2012-11-09 15:55:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/stuartmorgan@chromium.org/11293198/1

[commit-bot: I haz the power, 2012-11-09 18:04:51]

Change committed as 166931