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

third_party/WebKit/Source/modules/keyboard_lock/NavigatorKeyboardLock.h

+// 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.
+
+#ifndef NavigatorKeyboardLock_h
+#define NavigatorKeyboardLock_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "core/frame/Navigator.h"
+#include "platform/KeyboardLocker.h"
+#include "platform/Supplementable.h"
+#include "platform/heap/Handle.h"
+#include "platform/heap/Member.h"
+#include "wtf/Forward.h"
+
+namespace blink {
+
+class ChromeClient;
+class ScriptPromiseResolver;
+
+class CORE_EXPORT NavigatorKeyboardLock final
+    : public GarbageCollectedFinalized<NavigatorKeyboardLock>,
+      public Supplement<Navigator>,
+      private KeyboardLockerClient {
+  USING_GARBAGE_COLLECTED_MIXIN(NavigatorKeyboardLock);
+
+ public:
+  static NavigatorKeyboardLock& From(Navigator&);
+
+  static ScriptPromise requestKeyLock(ScriptState*,
+                                      Navigator&,
+                                      const Vector<String>&);
+  ScriptPromise requestKeyLock(ScriptState*, const Vector<String>&);
+
+  static void cancelKeyLock(Navigator&);
+  void cancelKeyLock();
+
+  DECLARE_TRACE();
+
+ private:
+  explicit NavigatorKeyboardLock(Navigator&);
+  static const char* SupplementName();
+
+  // KeyboardLockerClient
+  void LockRequestFinished(bool, const String&) override;
+
+  bool RetrieveChromeClient(ChromeClient*&, String&) const;

[whywhat, 2017/04/11 14:52:33]

I don't think you need ChromeClient plumbing at all - you could just get the
service from here (see MediaSession as an example:
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/medias...)

[Hzj_jie, 2017/04/12 02:51:06]

Yes, I just found this solution: my solution seems very old fashion.
Most of the logic in WebKit have been simplified.

+
+  Member<ScriptPromiseResolver> request_keylock_resolver_;
+};
+
+}  // namespace blink
+
+#endif  // NavigatorKeyboardLock_h