Enable the WebIDL [Exposed] annotation on an interface's members.

Source/core/dom/ExecutionContextClient.h

Index: Source/core/dom/ExecutionContextClient.h
diff --git a/Source/core/dom/ExecutionContextClient.h b/Source/core/dom/ExecutionContextClient.h
index 64aaef5250b0d8584ed9181e92737cfff79e3fe5..f1362c1efda3c9f0bedbd30f7c77598fdf80b9a7 100644
--- a/Source/core/dom/ExecutionContextClient.h
+++ b/Source/core/dom/ExecutionContextClient.h
@@ -50,6 +50,9 @@ public:
 
     virtual bool isDocument() const { return false; }
     virtual bool isWorkerGlobalScope() const { return false; }
+    virtual bool isDedicatedWorkerGlobalScope() const { return false; }
+    virtual bool isSharedWorkerGlobalScope() const { return false; }
+    virtual bool isServiceWorkerGlobalScope() const { return false; }
     virtual bool isJSExecutionForbidden() const = 0;
     virtual LocalDOMWindow* executingWindow() { return 0; }
     virtual String userAgent(const KURL&) const = 0;