Revert of Refactoring activity logger.

Source/core/html/HTMLIFrameElement.cpp

Index: Source/core/html/HTMLIFrameElement.cpp
diff --git a/Source/core/html/HTMLIFrameElement.cpp b/Source/core/html/HTMLIFrameElement.cpp
index 49d29fc05aa70fc658c0cff5c3c6df23849f4e4a..71fdaf39891c6b9ba294e698b8954684ca57e8dd 100644
--- a/Source/core/html/HTMLIFrameElement.cpp
+++ b/Source/core/html/HTMLIFrameElement.cpp
@@ -70,22 +70,6 @@
         HTMLFrameElementBase::collectStyleForPresentationAttribute(name, value, style);
 }
 
-void HTMLIFrameElement::attributeWillChange(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue)
-{
-    if (name == srcAttr && inDocument()) {
-        V8DOMActivityLogger* activityLogger = V8DOMActivityLogger::currentActivityLoggerIfIsolatedWorld();
-        if (activityLogger) {
-            Vector<String> argv;
-            argv.append("iframe");
-            argv.append(srcAttr.toString());
-            argv.append(oldValue);
-            argv.append(newValue);
-            activityLogger->logEvent("blinkSetAttribute", argv.size(), argv.data());
-        }
-    }
-    HTMLFrameElementBase::attributeWillChange(name, oldValue, newValue);
-}
-
 void HTMLIFrameElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == nameAttr) {