Move ownership of IdleSpellCheckCallback from LocalFrame to SpellChecker

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 "platform/Timer.h"
 
@@ skipping 19 matching lines @@
   void setNeedsColdModeInvocation();
 
   // Cleans everything up and makes the callback inactive. Should be called when
   // document is detached or spellchecking is globally disabled.
   // TODO(xiaochengh): Add proper call sites.
   void deactivate();
 
   // Exposed for testing only.
   SpellCheckRequester& spellCheckRequester() const;
 
-  // The leak detector will report leaks should queued requests be posted
-  // while it GCs repeatedly, as the requests keep their associated element
-  // alive.
-  //
-  // Hence allow the leak detector to effectively stop the spell checker to
-  // ensure leak reporting stability.
-  void prepareForLeakDetection();
-
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit IdleSpellCheckCallback(LocalFrame&);
   void handleEvent(IdleDeadline*) override;
 
   LocalFrame& frame() const { return *m_frame; }
 
   enum class State {
     kInactive,
@@ skipping 20 matching lines @@
 
   State m_state;
   const Member<LocalFrame> m_frame;
 
   TaskRunnerTimer<IdleSpellCheckCallback> m_coldModeTimer;
 };
 
 }  // namespace blink
 
 #endif  // IdleSpellCheckCallback_h