Remove ExecutionContext::lifecycleNotifier.

Source/core/dom/ExecutionContext.h

Index: Source/core/dom/ExecutionContext.h
diff --git a/Source/core/dom/ExecutionContext.h b/Source/core/dom/ExecutionContext.h
index 25db3803fc59755487154072a5580e886296c020..2d15a0935a87cb3be6847426d3c3e9cce39beba6 100644
--- a/Source/core/dom/ExecutionContext.h
+++ b/Source/core/dom/ExecutionContext.h
@@ -105,7 +105,6 @@ public:
 
     bool activeDOMObjectsAreSuspended() const { return m_activeDOMObjectsAreSuspended; }
     bool activeDOMObjectsAreStopped() const { return m_activeDOMObjectsAreStopped; }
-    bool isIteratingOverObservers() const;
 
     // Called after the construction of an ActiveDOMObject to synchronize suspend state.
     void suspendActiveDOMObjectIfNeeded(ActiveDOMObject*);
@@ -136,8 +135,6 @@ protected:
     virtual const KURL& virtualURL() const = 0;
     virtual KURL virtualCompleteURL(const String&) const = 0;
 
-    ContextLifecycleNotifier& lifecycleNotifier();
-
 private:
     bool dispatchErrorEvent(PassRefPtrWillBeRawPtr<ErrorEvent>, AccessControlStatus);
 
@@ -160,8 +157,6 @@ private:
 
     bool m_strictMixedContentCheckingEnforced;
 
-    OwnPtr<ContextLifecycleNotifier> m_lifecycleNotifier;
-
     // Counter that keeps track of how many window interaction calls are allowed
     // for this ExecutionContext. Callers are expected to call
     // |allowWindowInteraction()| and |consumeWindowInteraction()| in order to