[bindings] Implement an ExperimentEnabled IDL extended attribute.

third_party/WebKit/Source/bindings/tests/results/core/V8TestInterface.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestInterface.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterface.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterface.cpp
index 9c237a3dad70f479cb53aca8a302bb046eb48605..76e45be8fa0f1fab54f3bcc73fed39747fa493cb 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterface.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestInterface.cpp
@@ -31,6 +31,7 @@
 #include "bindings/tests/idls/core/TestPartialInterfaceImplementation.h"
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/Document.h"
+#include "core/experiments/Experiments.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/UseCounter.h"
 #include "core/inspector/ConsoleMessage.h"
@@ -2395,11 +2396,19 @@ void V8TestInterface::installV8TestInterfaceTemplate(v8::Local<v8::FunctionTempl
     v8::Local<v8::Signature> defaultSignature;
     if (!RuntimeEnabledFeatures::featureNameEnabled())
         defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", V8TestInterfaceEmpty::domTemplate(isolate), V8TestInterface::internalFieldCount, 0, 0, 0, 0, 0, 0);
-    else
-        defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", V8TestInterfaceEmpty::domTemplate(isolate), V8TestInterface::internalFieldCount,
-            V8TestInterfaceAttributes, WTF_ARRAY_LENGTH(V8TestInterfaceAttributes),
-            V8TestInterfaceAccessors, WTF_ARRAY_LENGTH(V8TestInterfaceAccessors),
-            V8TestInterfaceMethods, WTF_ARRAY_LENGTH(V8TestInterfaceMethods));
+    else {
+        ExecutionContext* ec = currentExecutionContext(isolate);
+        ALLOW_UNUSED_LOCAL(ec);
+        if (!Experiments::isApiEnabledWithoutMessage(ec, "ExperimentName")) {
+            defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", V8TestInterfaceEmpty::domTemplate(isolate), V8TestInterface::internalFieldCount, 0, 0, 0, 0, 0, 0);
+        }
+        else
+            defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", V8TestInterfaceEmpty::domTemplate(isolate), V8TestInterface::internalFieldCount,
+                V8TestInterfaceAttributes, WTF_ARRAY_LENGTH(V8TestInterfaceAttributes),
+                V8TestInterfaceAccessors, WTF_ARRAY_LENGTH(V8TestInterfaceAccessors),
+                V8TestInterfaceMethods, WTF_ARRAY_LENGTH(V8TestInterfaceMethods));
+    }
+
     v8::Local<v8::ObjectTemplate> instanceTemplate = functionTemplate->InstanceTemplate();
     ALLOW_UNUSED_LOCAL(instanceTemplate);
     v8::Local<v8::ObjectTemplate> prototypeTemplate = functionTemplate->PrototypeTemplate();
@@ -2465,6 +2474,8 @@ void V8TestInterface::installV8TestInterfaceTemplate(v8::Local<v8::FunctionTempl
         {"PARTIAL2_UNSIGNED_SHORT", 0, 0, V8DOMConfiguration::ConstantTypeUnsignedShort},
     };
     V8DOMConfiguration::installConstants(isolate, functionTemplate, prototypeTemplate, V8TestInterfaceConstants, WTF_ARRAY_LENGTH(V8TestInterfaceConstants));
+    ExecutionContext* ec = currentExecutionContext(isolate);
+    ALLOW_UNUSED_LOCAL(ec);
     if (RuntimeEnabledFeatures::partialFeatureNameEnabled()) {
         const V8DOMConfiguration::ConstantConfiguration constantPartialUnsignedShortConfiguration = {"PARTIAL_UNSIGNED_SHORT", 0, 0, V8DOMConfiguration::ConstantTypeUnsignedShort};
         V8DOMConfiguration::installConstant(isolate, functionTemplate, prototypeTemplate, constantPartialUnsignedShortConfiguration);