Adds AL logging for Blink core events.

Source/core/html/HTMLFormElement.cpp

Index: Source/core/html/HTMLFormElement.cpp
diff --git a/Source/core/html/HTMLFormElement.cpp b/Source/core/html/HTMLFormElement.cpp
index 9878763846e52c66645603eebdaaa545fc56bde3..d5609dbad4d7eaa20578d77ec9d4e476c873fd99 100644
--- a/Source/core/html/HTMLFormElement.cpp
+++ b/Source/core/html/HTMLFormElement.cpp
@@ -28,6 +28,7 @@
 #include <limits>
 #include "bindings/v8/ScriptController.h"
 #include "bindings/v8/ScriptEventListener.h"
+#include "bindings/v8/V8DOMActivityLogger.h"
 #include "core/HTMLNames.h"
 #include "core/dom/Attribute.h"
 #include "core/dom/Document.h"
@@ -136,6 +137,16 @@ bool HTMLFormElement::rendererIsNeeded(const RenderStyle& style)
 
 Node::InsertionNotificationRequest HTMLFormElement::insertedInto(ContainerNode* insertionPoint)
 {
+    if (insertionPoint->inDocument()) {
+        V8DOMActivityLogger* activityLogger = V8DOMActivityLogger::currentActivityLoggerIfIsolatedWorld();
+        if (activityLogger) {
+            Vector<String> argv;
+            argv.append("form");
+            argv.append(fastGetAttribute(methodAttr));
+            argv.append(fastGetAttribute(actionAttr));
+            activityLogger->logEvent("blinkAddElement", argv.size(), argv.data());
+        }
+    }
     HTMLElement::insertedInto(insertionPoint);
     if (insertionPoint->inDocument())
         this->document().didAssociateFormControl(this);