Revert of Introduce ash mojo interface for lock screen action handlers

ash/tray_action/tray_action.cc

Index: ash/tray_action/tray_action.cc
diff --git a/ash/tray_action/tray_action.cc b/ash/tray_action/tray_action.cc
deleted file mode 100644
index 6437c61f17db8de21b6b553e56acde0e8889609c..0000000000000000000000000000000000000000
--- a/ash/tray_action/tray_action.cc
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2017 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 "ash/tray_action/tray_action.h"
-
-#include <utility>
-
-#include "ash/tray_action/tray_action_observer.h"
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/logging.h"
-
-namespace ash {
-
-TrayAction::TrayAction() = default;
-
-TrayAction::~TrayAction() = default;
-
-void TrayAction::AddObserver(TrayActionObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void TrayAction::RemoveObserver(TrayActionObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-void TrayAction::BindRequest(mojom::TrayActionRequest request) {
-  bindings_.AddBinding(this, std::move(request));
-}
-
-mojom::TrayActionState TrayAction::GetLockScreenNoteState() {
-  if (!tray_action_client_)
-    return mojom::TrayActionState::kNotAvailable;
-  return lock_screen_note_state_;
-}
-
-void TrayAction::SetClient(mojom::TrayActionClientPtr tray_action_client,
-                           mojom::TrayActionState lock_screen_note_state) {
-  mojom::TrayActionState old_lock_screen_note_state = GetLockScreenNoteState();
-
-  tray_action_client_ = std::move(tray_action_client);
-
-  if (tray_action_client_) {
-    // Makes sure the state is updated in case the connection is lost.
-    tray_action_client_.set_connection_error_handler(
-        base::Bind(&TrayAction::SetClient, base::Unretained(this), nullptr,
-                   mojom::TrayActionState::kNotAvailable));
-    lock_screen_note_state_ = lock_screen_note_state;
-  }
-
-  // Setting action handler value can change effective state - notify observers
-  // if that was the case.
-  if (GetLockScreenNoteState() != old_lock_screen_note_state)
-    NotifyLockScreenNoteStateChanged();
-}
-
-void TrayAction::UpdateLockScreenNoteState(mojom::TrayActionState state) {
-  if (state == lock_screen_note_state_)
-    return;
-
-  lock_screen_note_state_ = state;
-
-  // If the client is not set, the effective state has not changed, so no need
-  // to notify observers of a state change.
-  if (tray_action_client_)
-    NotifyLockScreenNoteStateChanged();
-}
-
-void TrayAction::RequestNewLockScreenNote() {
-  if (GetLockScreenNoteState() != mojom::TrayActionState::kAvailable)
-    return;
-
-  // An action state can be kAvailable only if |tray_action_client_| is set.
-  DCHECK(tray_action_client_);
-  tray_action_client_->RequestNewLockScreenNote();
-}
-
-void TrayAction::NotifyLockScreenNoteStateChanged() {
-  for (auto& observer : observers_)
-    observer.OnLockScreenNoteStateChanged(GetLockScreenNoteState());
-}
-
-}  // namespace ash