Keyboard Lock Host implementation

components/keyboard_lock/key_event_filter_thread_proxy.cc

Index: components/keyboard_lock/key_event_filter_thread_proxy.cc
diff --git a/components/keyboard_lock/key_event_filter_thread_proxy.cc b/components/keyboard_lock/key_event_filter_thread_proxy.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b1152422241aa9939577c8dc2c61576b0181db22
--- /dev/null
+++ b/components/keyboard_lock/key_event_filter_thread_proxy.cc
@@ -0,0 +1,52 @@
+// 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/key_event_filter_thread_proxy.h"
+
+#include <utility>
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/single_thread_task_runner.h"
+
+namespace keyboard_lock {
+
+KeyEventFilterThreadProxy::KeyEventFilterThreadProxy(
+    scoped_refptr<base::SingleThreadTaskRunner> runner,
+    std::unique_ptr<KeyEventFilter> filter)
+    : runner_(std::move(runner)),
+      filter_(std::move(filter)) {
+  DCHECK(runner_);
+  DCHECK(filter_);
+}
+
+KeyEventFilterThreadProxy::~KeyEventFilterThreadProxy() {
+  runner_->DeleteSoon(FROM_HERE,
+      (*const_cast<std::unique_ptr<KeyEventFilter>*>(&filter_)).release());
+}
+
+bool KeyEventFilterThreadProxy::OnKeyDown(ui::KeyboardCode code, int flags) {
+  runner_->PostTask(FROM_HERE, base::Bind(
+      [](KeyEventFilter* filter, ui::KeyboardCode code, int flags) {
+        filter->OnKeyDown(code, flags);
+      },
+      base::Unretained(filter_.get()),
+      code,
+      flags));
+  return true;
+}
+
+bool KeyEventFilterThreadProxy::OnKeyUp(ui::KeyboardCode code, int flags) {
+  runner_->PostTask(FROM_HERE, base::Bind(
+      [](KeyEventFilter* filter, ui::KeyboardCode code, int flags) {
+        filter->OnKeyUp(code, flags);
+      },
+      base::Unretained(filter_.get()),
+      code,
+      flags));
+  return true;
+}
+
+}  // namespace keyboard_lock