[bindings] Implement an ExperimentEnabled IDL extended attribute.

third_party/WebKit/Source/bindings/tests/results/core/V8TestException.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestException.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestException.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestException.cpp
index 8213ef718e41431cf721b6522e0f91f1aa8c61a1..12e5677a0f34e705913174f4abe6c488f6f88686 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestException.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestException.cpp
@@ -12,6 +12,7 @@
 #include "bindings/core/v8/V8ObjectConstructor.h"
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/Document.h"
+#include "core/experiments/Experiments.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/TraceEvent.h"
@@ -145,6 +146,8 @@ static void installV8TestExceptionTemplate(v8::Local<v8::FunctionTemplate> funct
         {"UNSIGNED_SHORT_CONSTANT", 1, 0, V8DOMConfiguration::ConstantTypeUnsignedShort},
     };
     V8DOMConfiguration::installConstants(isolate, functionTemplate, prototypeTemplate, V8TestExceptionConstants, WTF_ARRAY_LENGTH(V8TestExceptionConstants));
+    ExecutionContext* ec = currentExecutionContext(isolate);
+    ALLOW_UNUSED_LOCAL(ec);
 }
 
 v8::Local<v8::FunctionTemplate> V8TestException::domTemplate(v8::Isolate* isolate)