Use LanguageCodeWithDialects instead of LanguageCode to get 'zh-CN'  instead of 'zh'. 
Use LanguageCodeWithDialects instead of LanguageCode to get 'zh-CN' 
instead of 'zh'. 

This was a part of http://codereview.chromium.org/549123/show (LGTM'd by jcampan by email), but that CL is failing the unittest after the CLD update by jcampan. So, 
I'm landing this small change first.

BUG=32759
TEST=NONE
TBR=jcampan

Review URL: http://codereview.chromium.org/561065

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@38073 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser