Revert of Refactoring activity logger.

Source/core/html/HTMLButtonElement.cpp

Index: Source/core/html/HTMLButtonElement.cpp
diff --git a/Source/core/html/HTMLButtonElement.cpp b/Source/core/html/HTMLButtonElement.cpp
index ad348a0354b470eb7f5be8cc7de7e59aeb69d811..0ec7bb87fae118685fd629273def7f99c983751d 100644
--- a/Source/core/html/HTMLButtonElement.cpp
+++ b/Source/core/html/HTMLButtonElement.cpp
@@ -230,20 +230,4 @@
     return HTMLFormControlElement::insertedInto(insertionPoint);
 }
 
-void HTMLButtonElement::attributeWillChange(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue)
-{
-    if (name == formactionAttr && inDocument()) {
-        V8DOMActivityLogger* activityLogger = V8DOMActivityLogger::currentActivityLoggerIfIsolatedWorld();
-        if (activityLogger) {
-            Vector<String> argv;
-            argv.append("button");
-            argv.append(formactionAttr.toString());
-            argv.append(oldValue);
-            argv.append(newValue);
-            activityLogger->logEvent("blinkSetAttribute", argv.size(), argv.data());
-        }
-    }
-    HTMLFormControlElement::attributeWillChange(name, oldValue, newValue);
-}
-
 } // namespace