IME for Mus: Remove OnTextInputModeChanged() from IME's mojo API.

chrome/browser/ui/views/ime_driver/input_method_bridge_chromeos.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/ime_driver/input_method_bridge_chromeos.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/ui/views/ime_driver/remote_text_input_client.h"
 
 InputMethodBridge::InputMethodBridge(ui::mojom::TextInputClientPtr client)
     : client_(base::MakeUnique<RemoteTextInputClient>(std::move(client))),
       input_method_chromeos_(
           base::MakeUnique<ui::InputMethodChromeOS>(nullptr)) {
   input_method_chromeos_->SetFocusedTextInputClient(client_.get());
 }
 
 InputMethodBridge::~InputMethodBridge() {}
 
-void InputMethodBridge::OnTextInputModeChanged(
-    ui::TextInputMode text_input_mode) {
-  // TODO(moshayedi): crbug.com/631527. Consider removing this, as
-  // ui::InputMethodChromeOS doesn't have this.
-}
-
 void InputMethodBridge::OnTextInputTypeChanged(
     ui::TextInputType text_input_type) {
   input_method_chromeos_->OnTextInputTypeChanged(client_.get());
 }
 
 void InputMethodBridge::OnCaretBoundsChanged(const gfx::Rect& caret_bounds) {
   input_method_chromeos_->OnCaretBoundsChanged(client_.get());
 }
 
 void InputMethodBridge::ProcessKeyEvent(
     std::unique_ptr<ui::Event> event,
     const ProcessKeyEventCallback& callback) {
   DCHECK(event->IsKeyEvent());
   ui::KeyEvent* key_event = event->AsKeyEvent();
   if (!key_event->is_char()) {
     input_method_chromeos_->DispatchKeyEvent(
         key_event, base::MakeUnique<base::Callback<void(bool)>>(callback));
   } else {
     // On Linux (include ChromeOS), the mus emulates the WM_CHAR generation
     // behaviour of Windows. But for ChromeOS, we don't expect those char
     // events, so we filter them out.
     const bool handled = true;
     callback.Run(handled);
   }
 }
 
 void InputMethodBridge::CancelComposition() {
   input_method_chromeos_->CancelComposition(client_.get());
 }