Removed execute bit on files that don't need it.

https://codereview.chromium.org/24712003 broke http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Full/builds/26010: this should fix it.

BUG=
TBR=tmdiep@chromium.org

Review URL: https://codereview.chromium.org/25227002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225928 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225928