Avoid WTF::Vector::at() and operator[] in core/html.

third_party/WebKit/Source/core/html/PublicURLManager.cpp

Index: third_party/WebKit/Source/core/html/PublicURLManager.cpp
diff --git a/third_party/WebKit/Source/core/html/PublicURLManager.cpp b/third_party/WebKit/Source/core/html/PublicURLManager.cpp
index e50b4af8451af1c102a1978a069602c6df65a3d3..57655b2d84d39ce9836a72e425c483b318eeb87b 100644
--- a/third_party/WebKit/Source/core/html/PublicURLManager.cpp
+++ b/third_party/WebKit/Source/core/html/PublicURLManager.cpp
@@ -87,8 +87,8 @@ void PublicURLManager::revoke(const String& uuid) {
         urlsToRemove.append(registeredUrl.key);
       }
     }
-    for (unsigned j = 0; j < urlsToRemove.size(); j++)
-      registeredURLs.remove(urlsToRemove[j]);
+    for (const auto& url : urlsToRemove)
+      registeredURLs.remove(url);
     urlsToRemove.clear();
   }
 }