Use C++11 features in core/timing

Source/core/timing/ResourceTimingInfo.h

Index: Source/core/timing/ResourceTimingInfo.h
diff --git a/Source/core/timing/ResourceTimingInfo.h b/Source/core/timing/ResourceTimingInfo.h
index 129f63d4dde503f3cec3286ea5b3f75da1bc3be9..316ea95a339aa0374d8227935e302aafa9491805 100644
--- a/Source/core/timing/ResourceTimingInfo.h
+++ b/Source/core/timing/ResourceTimingInfo.h
@@ -67,8 +67,8 @@ public:
     void clearLoadTimings()
     {
         m_finalResponse.setResourceLoadTiming(nullptr);
-        for (size_t i = 0; i < m_redirectChain.size(); ++i)
-            m_redirectChain[i].setResourceLoadTiming(nullptr);
+        for (ResourceResponse& redirect : m_redirectChain)
+            redirect.setResourceLoadTiming(nullptr);
     }
 
 private: