Use C++11 range-based loop in core/frame

Source/core/frame/DOMWindowLifecycleNotifier.cpp

Index: Source/core/frame/DOMWindowLifecycleNotifier.cpp
diff --git a/Source/core/frame/DOMWindowLifecycleNotifier.cpp b/Source/core/frame/DOMWindowLifecycleNotifier.cpp
index 60918c40eae1fe3ce67f5381a9009898537e1b65..6d5549356f8e1a7b743d8e7b988eb5be16d6acd0 100644
--- a/Source/core/frame/DOMWindowLifecycleNotifier.cpp
+++ b/Source/core/frame/DOMWindowLifecycleNotifier.cpp
@@ -62,22 +62,22 @@ PassOwnPtr<DOMWindowLifecycleNotifier> DOMWindowLifecycleNotifier::create(LocalD
 void DOMWindowLifecycleNotifier::notifyAddEventListener(LocalDOMWindow* window, const AtomicString& eventType)
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDOMWindowObservers);
-    for (DOMWindowObserverSet::iterator it = m_windowObservers.begin(); it != m_windowObservers.end(); ++it)
-        (*it)->didAddEventListener(window, eventType);
+    for (const auto& windowObserver : m_windowObservers)
+        windowObserver->didAddEventListener(window, eventType);
 }
 
 void DOMWindowLifecycleNotifier::notifyRemoveEventListener(LocalDOMWindow* window, const AtomicString& eventType)
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDOMWindowObservers);
-    for (DOMWindowObserverSet::iterator it = m_windowObservers.begin(); it != m_windowObservers.end(); ++it)
-        (*it)->didRemoveEventListener(window, eventType);
+    for (const auto& windowObserver : m_windowObservers)
+        windowObserver->didRemoveEventListener(window, eventType);
 }
 
 void DOMWindowLifecycleNotifier::notifyRemoveAllEventListeners(LocalDOMWindow* window)
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDOMWindowObservers);
-    for (DOMWindowObserverSet::iterator it = m_windowObservers.begin(); it != m_windowObservers.end(); ++it)
-        (*it)->didRemoveAllEventListeners(window);
+    for (const auto& windowObserver : m_windowObservers)
+        windowObserver->didRemoveAllEventListeners(window);
 }
 
 } // namespace blink