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This is a reland of 29ff7965

Reordered initialization to fix ASAN/MSAN bug.

Original change's description:
> ime: Handle InsertTextCursorBehavior in InputMethodChromeOS.
>
> TextInputClients now support moving the cursor after committing some
> text. This patch adds support for input engines to call the new API.
>
> There is a slight complication with multiple CommitText calls during
> key event handling. Previously, when handling a key event, any calls
> to CommitText will be coalesced together and executed once the key
> event is handled. However, this coalescing logic doesn't handle
> cursor movement.
>
> Add logic to handle cursor movement when coalescing commits by observing that
> any sequence of CommitTexts with cursor movement can be implemented with two
> separate CommitTexts. Note that this is a no-op change if the IME never uses
> the new cursor movement parameter.
>
> Bug: 1155331
> Change-Id: I6c89ec1cde5624eca7bf0d5c803085f7d7803c71
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2576067
> Reviewed-by: Keith Lee <keithlee@chromium.org>
> Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
> Commit-Queue: Darren Shen <shend@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#840082}

Bug: 1155331
Change-Id: I373a8195946ec4fb966f932eaf084b2b74f06b6c
Cq-Include-Trybots: luci.chromium.try:linux_chromium_chromeos_msan_rel_ng,linux_chromium_chromeos_asan_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2612604Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
Reviewed-by: John Palmer <jopalmer@chromium.org>
Reviewed-by: Keith Lee <keithlee@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842595}