The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b171ff9c2c408898b6678001574019efefc42b09

commit b171ff9c2c408898b6678001574019efefc42b09
Author: moshayedi <moshayedi@chromium.org>
Date: Mon Dec 12 23:29:36 2016

IME for Mus: Use ui::InputMethodChromeOS to provide logic for ime driver.

The goal of this CL is to modify content_browser's IMEDriver so we have access
to ui::InputMethodChromeOS's functionality in mus+ash.

This CL:
- Modifies ui::InputMethodChromeOS so it can call an ack callback after
  processing events.
- Introduces InputMethodBridge to acts as a bridge between
  ui::mojom::InputMethod and ui::InputMethodChromeOS.
- Introduces RemoteTextInputClient to send commands received from
  ui::InputMethodChromeOS to a remote client over mojo IPC.
- Modifies content_browser's IMEDriver implementation to use
  ui::InputMethodChromeOS via InputMethodBridge.
- Some unittests to verify that InputMethodBridge works correctly.

BUG= 665981 

Review-Url: https://codereview.chromium.org/2557493002
Cr-Commit-Position: refs/heads/master@{#437955}

[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/chrome_browser_main_extra_parts_views.cc
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/ime_driver_mus.cc
[rename] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/ime_driver_mus.h
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/input_method_bridge_chromeos.cc
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/input_method_bridge_chromeos.h
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/input_method_bridge_chromeos_unittest.cc
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/remote_text_input_client.cc
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/remote_text_input_client.h
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/simple_input_method.cc
[add] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/browser/ui/views/ime_driver/simple_input_method.h
[delete] https://crrev.com/561b5ae646d076efe21e2cc759b6d97ebb04ab0d/chrome/browser/ui/views/ime_driver_mus.cc
[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/chrome/test/BUILD.gn
[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/ui/aura/mus/text_input_client_impl.cc
[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/ui/base/ime/input_method_chromeos.cc
[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/ui/base/ime/input_method_chromeos.h
[modify] https://crrev.com/b171ff9c2c408898b6678001574019efefc42b09/ui/views/mus/text_input_client_impl.cc

More IME bugs.

 Issue 673769  is to move IME code out of the browser, which should be part of the new IMF work. Removing it as blocker and close this one.