Implement ui::Clipboard::ReadAvailableTypes
Implement ui::Clipboard::ReadAvailableTypes

Issue: CBBROWSER-276
Change-Id: I20dbda20fda49ffd9cfc85a47e1d61e08a9d4d9e

hgl888/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,crosswalk-project/chromium-efl