Add use counters for using Attrs as Nodes.

Source/bindings/scripts/code_generator_v8.pm

Index: Source/bindings/scripts/code_generator_v8.pm
diff --git a/Source/bindings/scripts/code_generator_v8.pm b/Source/bindings/scripts/code_generator_v8.pm
index 949a2262119f32bb250e87c8a1dc740f64289c6e..d0e432ec7f81e3f741c9e4cbb065247bbfd9e98a 100644
--- a/Source/bindings/scripts/code_generator_v8.pm
+++ b/Source/bindings/scripts/code_generator_v8.pm
@@ -1426,6 +1426,7 @@ sub GenerateNormalAttributeGetterCallback
     $code .= "    TRACE_EVENT_SET_SAMPLING_STATE(\"Blink\", \"DOMGetter\");\n";
     $code .= GenerateFeatureObservation($attrExt->{"MeasureAs"});
     $code .= GenerateDeprecationNotification($attrExt->{"DeprecateAs"});
+    $code .= GenerateAttrUsedAsNodeReceiverCheck($interface);
     if (HasActivityLogging($forMainWorldSuffix, $attrExt, "Getter")) {
         $code .= GenerateActivityLogging("Getter", $interface, "${attrName}");
     }
@@ -1888,6 +1889,8 @@ sub GenerateNormalAttributeSetterCallback
     $code .= "    TRACE_EVENT_SET_SAMPLING_STATE(\"Blink\", \"DOMSetter\");\n";
     $code .= GenerateFeatureObservation($attrExt->{"MeasureAs"});
     $code .= GenerateDeprecationNotification($attrExt->{"DeprecateAs"});
+    $code .= GenerateAttrUsedAsNodeReceiverCheck($interface);
+    $code .= GenerateAttrUsedAsNodeParameterCheckForSetter($attribute->type);
     if (HasActivityLogging($forMainWorldSuffix, $attrExt, "Setter")) {
         $code .= GenerateActivityLogging("Setter", $interface, "${attrName}");
     }
@@ -2257,6 +2260,62 @@ sub GenerateFunctionParametersCheck
     return ($numMandatoryParams, join(" || ", @orExpression));
 }
 
+sub GenerateAttrUsedAsNodeReceiverCheck
+{
+    my $interface = shift;
+
+    if ($interface->name eq "Node") {
+        AddToImplIncludes("core/frame/UseCounter.h");
+        AddToImplIncludes("V8Attr.h");
+        return <<END;
+    if (V8DOMWrapper::isWrapperOfType(info.Holder(), &V8Attr::wrapperTypeInfo))
+        UseCounter::count(activeExecutionContext(), UseCounter::AttrUsedAsNodeReceiver);
+END
+    }
+
+    return "";
+}
+
+sub GenerateAttrUsedAsNodeParameterCheck
+{
+    my $function = shift;
+
+    my $code = "";
+    my $paramIndex = 0;
+
+    foreach my $parameter (@{$function->parameters}) {
+        if ($parameter->type eq "Node") {
+            $code .= "    if (V8DOMWrapper::isWrapperOfType(info[$paramIndex], &V8Attr::wrapperTypeInfo))\n";
+            $code .= "        UseCounter::count(activeExecutionContext(), UseCounter::AttrUsedAsNodeParameter);\n";
+        }
+
+        $paramIndex += 1;
+    }
+
+    if ($code) {
+        AddToImplIncludes("core/frame/UseCounter.h");
+        AddToImplIncludes("V8Attr.h");
+    }
+
+    return $code;
+}
+
+sub GenerateAttrUsedAsNodeParameterCheckForSetter
+{
+    my $type = shift;
+
+    if ($type eq "Node") {
+        AddToImplIncludes("core/frame/UseCounter.h");
+        AddToImplIncludes("V8Attr.h");
+        return <<END;
+    if (V8DOMWrapper::isWrapperOfType(jsValue, &V8Attr::wrapperTypeInfo))
+        UseCounter::count(activeExecutionContext(), UseCounter::AttrUsedAsNodeParameter);
+END
+    }
+
+    return "";
+}
+
 sub GenerateOverloadedFunction
 {
     my $function = shift;
@@ -2284,8 +2343,10 @@ static void ${name}Method${forMainWorldSuffix}(const v8::FunctionCallbackInfo<v8
 END
     $code .= GenerateFeatureObservation($function->extendedAttributes->{"MeasureAs"});
     $code .= GenerateDeprecationNotification($function->extendedAttributes->{"DeprecateAs"});
+    $code .= GenerateAttrUsedAsNodeReceiverCheck($interface);
 
     foreach my $overload (@{$function->{overloads}}) {
+        $code .= GenerateAttrUsedAsNodeParameterCheck($overload);
         my ($numMandatoryParams, $parametersCheck) = GenerateFunctionParametersCheck($overload);
         $leastNumMandatoryParams = $numMandatoryParams if ($numMandatoryParams < $leastNumMandatoryParams);
         $code .= "    if ($parametersCheck) {\n";
@@ -2339,6 +2400,8 @@ END
     $code .= "    TRACE_EVENT_SET_SAMPLING_STATE(\"Blink\", \"DOMMethod\");\n";
     $code .= GenerateFeatureObservation($function->extendedAttributes->{"MeasureAs"});
     $code .= GenerateDeprecationNotification($function->extendedAttributes->{"DeprecateAs"});
+    $code .= GenerateAttrUsedAsNodeReceiverCheck($interface);
+    $code .= GenerateAttrUsedAsNodeParameterCheck($function);
     if (HasActivityLogging($forMainWorldSuffix, $function->extendedAttributes, "Access")) {
         $code .= GenerateActivityLogging("Method", $interface, "${name}");
     }
@@ -3735,6 +3798,7 @@ sub GenerateImplementationIndexedPropertySetter
 
     my $code = "static void indexedPropertySetter(uint32_t index, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<v8::Value>& info)\n";
     $code .= "{\n";
+    $code .= GenerateAttrUsedAsNodeParameterCheckForSetter($type);
 
     my $extraArguments = "";
     if ($raisesExceptions || IsIntegerType($type)) {
@@ -4045,6 +4109,7 @@ sub GenerateImplementationNamedPropertySetter
 
     my $code = "static void namedPropertySetter(v8::Local<v8::String> name, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<v8::Value>& info)\n";
     $code .= "{\n";
+    $code .= GenerateAttrUsedAsNodeParameterCheckForSetter($type);
     if (!$namedSetterFunction->extendedAttributes->{"OverrideBuiltins"}) {
         $code .= "    if (!info.Holder()->GetRealNamedPropertyInPrototypeChain(name).IsEmpty())\n";
         $code .= "        return;\n";