Adds variation IDs for the iOS Phone and Tablet NTP experiments.

Creates separate sets of IDs for beta vs stable experiments.  Also creates
separate IDs for phone vs tablet.

BUG=None
TEST=None

Review URL: https://codereview.chromium.org/150083006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250164 0039d316-1c4b-4281-b951-d872f2087c98
Translate bubble: Swap 'Cancel' and 'Done' button positions

These buttons should be swapped for the UX consistency.

BUG=341992
TEST=manual

Review URL: https://codereview.chromium.org/158663004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250165 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250165
Translate bubble: Swap 'Nope' action buttons and 'Translate' button

The current position of these is confusing because the arrow button seems
to affect the right button, so these positions should be swapped.

BUG=342263
TEST=manual

Review URL: https://codereview.chromium.org/132573004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250166 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250166