Font Settings API: Sample Extension minor UI improvements

Use input type=number and let font size settings affect only the sample texts.

BUG=114805
TBR=mpcomplete


Review URL: https://chromiumcodereview.appspot.com/10908166

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155675 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed