Revert "Merge pull request #21602 from RudyLu/keyboard/Bug1034210_commit"

This reverts commit 12afc5ca3076ea8cbcd5989b32d9d1a4f092eb8f.
Merge pull request #21602 from RudyLu/keyboard/Bug1034210_commit

Bug 1034210 - send correct keycode for non-latin IME. (Re-landed)
r=timdream.
a=v2.0+
(cherry picked from commit 8a7fb294444869ddaf869a58b21588752b9ce561)