Detach SpeechRecognitionController upon page detach.

Source/platform/LifecycleNotifier.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2013 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 47 matching lines @@
     bool isIteratingOverObservers() const { return m_iterating != IteratingNone; }
 
 protected:
     explicit LifecycleNotifier(Context* context)
         : m_iterating(IteratingNone)
         , m_context(context)
         , m_didCallContextDestroyed(false)
     {
     }
 
+    void detachObservers();
+
     Context* context() const { return m_context; }
 
     enum IterationType {
         IteratingNone,
         IteratingOverAll,
         IteratingOverActiveDOMObjects,
         IteratingOverDocumentObservers,
         IteratingOverPageObservers,
         IteratingOverDOMWindowObservers
     };
 
     IterationType m_iterating;
 
 private:
     typedef HashSet<Observer*> ObserverSet;
 
     ObserverSet m_observers;
     Context* m_context;
     bool m_didCallContextDestroyed;
 };
 
 template<typename T>
 inline LifecycleNotifier<T>::~LifecycleNotifier()
 {
     // FIXME: Enable the following ASSERT. Also see a FIXME in Document::detach().
     // ASSERT(!m_observers.size() || m_didCallContextDestroyed);
 
 #if !ENABLE(OILPAN)
-    TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverAll);
-    for (Observer* observer : m_observers) {
-        ASSERT(observer->lifecycleContext() == m_context);
-        observer->clearLifecycleContext();
-    }
+    detachObservers();
 #endif
 }
 
 template<typename T>
+inline void LifecycleNotifier<T>::detachObservers()
+{
+    TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverAll);
+    for (Observer* observer : m_observers) {
+        ASSERT(!observer->lifecycleContext() || observer->lifecycleContext() == m_context);
+        observer->clearLifecycleContext();
+    }
+}
+
+template<typename T>
 inline void LifecycleNotifier<T>::notifyContextDestroyed()
 {
     // Don't notify contextDestroyed() twice.
     if (m_didCallContextDestroyed)
         return;
 
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverAll);
     Vector<Observer*> snapshotOfObservers;
     copyToVector(m_observers, snapshotOfObservers);
     for (Observer* observer : snapshotOfObservers) {
@@ skipping 19 matching lines @@
 
 template<typename T>
 inline void LifecycleNotifier<T>::removeObserver(typename LifecycleNotifier<T>::Observer* observer)
 {
     m_observers.remove(observer);
 }
 
 } // namespace blink
 
 #endif // LifecycleNotifier_h