Enable device orientation by default.

Enable device orientation by default. Replace the --enable-device-orientation
command-line flag with a --disable-device-orientation flag.

BUG=44654
TEST=browser_tests --gtest_filter="DeviceOrientationBrowserTest.*"

Review URL: http://codereview.chromium.org/3136038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57684 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed