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This reverts commit 328e5c36.

Reason for revert: compile failed on https://ci.chromium.org/p/chrome/builders/ci/linux-chromeos-google-rel/10375?blamelist=1#blamelist-tab, https://ci.chromium.org/p/chrome/builders/ci/chromeos-eve-google-rel/3538 and https://ci.chromium.org/p/chrome/builders/ci/chromeos-betty-google-rel/16026?blamelist=1#blamelist-tab

Original change's description:
> Convert InputEngineManager client to use BrowserInterfaceBroker
> 
> This CL converts InputEngineManager mojom interface clients for
> extensions in chrome to use BrowserInterfaceBroker.
> 
> Bug: 936482
> Change-Id: Iecc57f2a8c15a9523f08e4ab49156273a2ba4677
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1952623
> Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
> Reviewed-by: Oksana Zhuravlova <oksamyt@chromium.org>
> Reviewed-by: Sam McNally <sammc@chromium.org>
> Reviewed-by: Ken Rockot <rockot@google.com>
> Cr-Commit-Position: refs/heads/master@{#723261}

TBR=rockot@google.com,sammc@chromium.org,oksamyt@chromium.org,myid.shin@igalia.com

Change-Id: I28cc7789bbedb8cb7dc9c46b60d6620105379ba2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 936482
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1959240Reviewed-by: Maggie Cai <mxcai@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723266}