Add IdleSpellCheckCallback to LocalFrame

third_party/WebKit/Source/core/editing/spellcheck/IdleSpellCheckCallback.h

 // Copyright 2016 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 IdleSpellCheckCallback_h
 #define IdleSpellCheckCallback_h
 
 #include "core/dom/IdleRequestCallback.h"
 #include "core/frame/LocalFrame.h"
 #include "platform/Timer.h"
 
 namespace blink {
 
 // Main class for the implementation of idle time spell checker.
 class IdleSpellCheckCallback final : public IdleRequestCallback {
  public:
-  // TODO(xiaochengh): Make each LocalFrame own an IdleSpellCheckCallback.
   static IdleSpellCheckCallback* create(LocalFrame&);
   ~IdleSpellCheckCallback() override;
 
   // Transit to HotModeRequested, if possible. Called by operations that need
   // spell checker to follow up.
   // TODO(xiaochengh): Add proper call sites.
   void setNeedsHotModeInvocation();
 
   // Transit to ColdModeTimerStarted, if possible. Sets up a timer, and requests
   // cold mode invocation if no critical operation occurs before timer firing.
@@ skipping 39 matching lines @@
   State m_state;
   const Member<LocalFrame> m_frame;
 
   // TODO(xiaochengh): assign the timer to some proper task runner.
   Timer<IdleSpellCheckCallback> m_coldModeTimer;
 };
 
 }  // namespace blink
 
 #endif  // IdleSpellCheckCallback_h