Let IdleSpellCheckCallback take full control over SpellCheckRequester

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 {
 
+class LocalFrame;
+class SpellCheckRequester;
+
 // Main class for the implementation of idle time spell checker.
-class IdleSpellCheckCallback final : public IdleRequestCallback {
+class CORE_EXPORT IdleSpellCheckCallback final : public IdleRequestCallback {
  public:
   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.
   // TODO(xiaochengh): Add proper call sites.
   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 21 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