Since open() and codecs.open() have different behavior, and codecs.open()
misbehaves on python 2.6, switch to open() with manual str decoding.

TBR=cmp@chromium.org
BUG=
TEST=I failed to reproduce, it's a shot in the dark


Review URL: https://chromiumcodereview.appspot.com/10698089

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@145396 0039d316-1c4b-4281-b951-d872f2087c98