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

Source/core/dom/ExecutionContext.h

Index: Source/core/dom/ExecutionContext.h
diff --git a/Source/core/dom/ExecutionContext.h b/Source/core/dom/ExecutionContext.h
index ccb887733cefe46d789cb35d8b1f7b96b33f70c9..32aa956a2a4d342b83b7695a5c73d58476984c5c 100644
--- a/Source/core/dom/ExecutionContext.h
+++ b/Source/core/dom/ExecutionContext.h
@@ -64,6 +64,9 @@ public:
     // Delegating to ExecutionContextClient
     bool isDocument() const { return m_client && m_client->isDocument(); }
     bool isWorkerGlobalScope() const { return m_client && m_client->isWorkerGlobalScope(); }
+    bool isDedicatedWorkerGlobalScope() const { return m_client && m_client->isDedicatedWorkerGlobalScope(); }
+    bool isSharedWorkerGlobalScope() const { return m_client && m_client->isSharedWorkerGlobalScope(); }
+    bool isServiceWorkerGlobalScope() const { return m_client && m_client->isServiceWorkerGlobalScope(); }
     bool isJSExecutionForbidden() { return m_client && m_client->isJSExecutionForbidden(); }
     SecurityOrigin* securityOrigin() const;
     ContentSecurityPolicy* contentSecurityPolicy() const;