Adding `content_security_policy` to 5 sample extensions

Touched:
* tabs/screenshot
* webNavigation/basic
* windows/merge_windows
* browserAction/make_page_red
* extensions/ttsdebug

BUG=92644
TEST=

Review URL: http://codereview.chromium.org/8318001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107094 0039d316-1c4b-4281-b951-d872f2087c98
36 files changed