Keyboard Lock Host implementation

components/keyboard_lock/active_key_event_filter_registrar.cc

Index: components/keyboard_lock/active_key_event_filter_registrar.cc
diff --git a/components/keyboard_lock/active_key_event_filter_registrar.cc b/components/keyboard_lock/active_key_event_filter_registrar.cc
new file mode 100644
index 0000000000000000000000000000000000000000..45a981d3760825ecfffa87de2912e68e2473366a
--- /dev/null
+++ b/components/keyboard_lock/active_key_event_filter_registrar.cc
@@ -0,0 +1,53 @@
+// 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 "components/keyboard_lock/active_key_event_filter_registrar.h"
+
+#include <utility>
+
+#include "components/keyboard_lock/active_key_event_filter_tracker.h"
+
+namespace keyboard_lock {
+
+ActiveKeyEventFilterRegistrar::ActiveKeyEventFilterRegistrar(
+    ActiveKeyEventFilterTracker* tracker,
+    std::unique_ptr<KeyHookActivator> key_hook,
+    KeyEventFilter* filter)
+    : tracker_(tracker),
+      key_hook_(std::move(key_hook)),
+      filter_(filter) {
+  DCHECK(tracker_);
+  DCHECK(key_hook_);
+  DCHECK(filter_);
+}
+
+ActiveKeyEventFilterRegistrar::~ActiveKeyEventFilterRegistrar() {
+  tracker_->erase(filter_);
+}
+
+void ActiveKeyEventFilterRegistrar::RegisterKey(
+    const std::vector<ui::KeyboardCode>& codes,
+    base::Callback<void(bool)> on_result) {
+  key_hook_->RegisterKey(codes, std::move(on_result));
+}
+
+void ActiveKeyEventFilterRegistrar::UnregisterKey(
+    const std::vector<ui::KeyboardCode>& codes,
+    base::Callback<void(bool)> on_result) {
+  key_hook_->RegisterKey(codes, std::move(on_result));
+}
+
+void ActiveKeyEventFilterRegistrar::Activate(
+    base::Callback<void(bool)> on_result) {
+  key_hook_->Activate(std::move(on_result));
+  tracker_->set(filter_);
+}
+
+void ActiveKeyEventFilterRegistrar::Deactivate(
+    base::Callback<void(bool)> on_result) {
+  key_hook_->Deactivate(std::move(on_result));
+  tracker_->erase(filter_);
+}
+
+}  // namespace keyboard_lock