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This CL addresses the reported bug by undoing the quick fix
http://crrev.com/595608 and lazily initializing Java side
TextSuggestionHost properly. Native side still needs to be
established eagerly to get the IPC to work. Now Java layer
is created before suggestion menu is requested to be shown
for the first time.

Bug: 884214
Change-Id: I1bbe9b2e3a5898d6dd082f8784951215a4a9ab91
Reviewed-on: https://chromium-review.googlesource.com/c/1256383
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596487}