Make SysNativeMB converters assume UTF-8 on Chrome OS. 
Make SysNativeMB converters assume UTF-8 on Chrome OS. 

Instead of using wcs*mbs and mbs*wcs, just call UTF-8 converters. 


BUG=39096
TEST=Covered by existing tests
Review URL: http://codereview.chromium.org/1222002

git-svn-id: http://src.chromium.org/svn/trunk/src@49118 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ab076c526e662af4fae1dc2050c416953e1bb7b8
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser