[bindings] Implement an ExperimentEnabled IDL extended attribute.

third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterfacePartial.cpp

Index: third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterfacePartial.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterfacePartial.cpp b/third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterfacePartial.cpp
index fb8c0a5998bc9cdfeab8db222403fa25f0c8cb4d..07e6be7be1342786c17b8558692c3276983a6109 100644
--- a/third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterfacePartial.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterfacePartial.cpp
@@ -19,6 +19,7 @@
 #include "bindings/tests/idls/modules/TestPartialInterfaceImplementation3.h"
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/Document.h"
+#include "core/experiments/Experiments.h"
 #include "core/frame/LocalFrame.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/ScriptForbiddenScope.h"
@@ -307,11 +308,19 @@ void V8TestInterfacePartial::installV8TestInterfaceTemplate(v8::Local<v8::Functi
     v8::Local<v8::Signature> defaultSignature;
     if (!RuntimeEnabledFeatures::featureNameEnabled())
         defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", v8::Local<v8::FunctionTemplate>(), V8TestInterface::internalFieldCount, 0, 0, 0, 0, 0, 0);
-    else
-        defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", v8::Local<v8::FunctionTemplate>(), V8TestInterface::internalFieldCount,
-            0, 0,
-            0, 0,
-            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", v8::Local<v8::FunctionTemplate>(), V8TestInterface::internalFieldCount, 0, 0, 0, 0, 0, 0);
+        }
+        else
+            defaultSignature = V8DOMConfiguration::installDOMClassTemplate(isolate, functionTemplate, "TestInterface", v8::Local<v8::FunctionTemplate>(), V8TestInterface::internalFieldCount,
+                0, 0,
+                0, 0,
+                V8TestInterfaceMethods, WTF_ARRAY_LENGTH(V8TestInterfaceMethods));
+    }
+
     v8::Local<v8::ObjectTemplate> instanceTemplate = functionTemplate->InstanceTemplate();
     ALLOW_UNUSED_LOCAL(instanceTemplate);
     v8::Local<v8::ObjectTemplate> prototypeTemplate = functionTemplate->PrototypeTemplate();
@@ -320,6 +329,8 @@ void V8TestInterfacePartial::installV8TestInterfaceTemplate(v8::Local<v8::Functi
         {"PARTIAL3_UNSIGNED_SHORT", 0, 0, V8DOMConfiguration::ConstantTypeUnsignedShort},
     };
     V8DOMConfiguration::installConstants(isolate, functionTemplate, prototypeTemplate, V8TestInterfaceConstants, WTF_ARRAY_LENGTH(V8TestInterfaceConstants));
+    ExecutionContext* ec = currentExecutionContext(isolate);
+    ALLOW_UNUSED_LOCAL(ec);
     functionTemplate->InstanceTemplate()->SetCallAsFunctionHandler(V8TestInterface::legacyCallCustom);
 }