[System-Keyboard-Lock] Forward navigator functions to RenderFrameHost

content/browser/keyboard_lock/keyboard_lock_service_impl.cc

+// 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 "content/browser/keyboard_lock/keyboard_lock_service_impl.h"
+
+#include <memory>
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "content/public/browser/render_frame_host.h"
+
+namespace content {
+
+KeyboardLockServiceImpl::KeyboardLockServiceImpl() = default;
+
+KeyboardLockServiceImpl::~KeyboardLockServiceImpl() = default;
+
+// static
+void KeyboardLockServiceImpl::CreateMojoService(
+    RenderFrameHost* render_frame_host,

[dcheng, 2017/04/28 02:24:49]

Nit: this appears to be unused, will it be used in future CLs? Maybe remove it
from this CL and add it when it's actually used

[Hzj_jie, 2017/04/28 04:53:01]

I believe this is not useful at all. (The keyboard lock host is a singleton
object, which cannot be referred from RenderFrameHost.)

+    blink::mojom::KeyboardLockServiceRequest request) {
+  mojo::MakeStrongBinding(
+        base::MakeUnique<KeyboardLockServiceImpl>(),
+        std::move(request));
+}
+
+void KeyboardLockServiceImpl::RequestKeyLock(
+    const std::vector<std::string>& key_codes,
+    const RequestKeyLockCallback& callback) {
+  // TODO(zijiehe): Implementation required.
+  callback.Run(true, std::string());
+}
+
+void KeyboardLockServiceImpl::CancelKeyLock() {
+  // TODO(zijiehe): Implementation required.
+}
+
+}  // namespace content