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diff --git a/WebKit/chromium/public/WebCommonWorkerClient.h b/WebKit/chromium/public/WebCommonWorkerClient.h
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+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WebCommonWorkerClient_h
+#define WebCommonWorkerClient_h
+
+namespace WebKit {
+
+class WebNotificationPresenter;
+class WebString;
+class WebWorker;
+class WebWorkerClient;
+
+// Provides an interface back to the in-page script object for a worker.
+// This interface contains common APIs used by both shared and dedicated
+// workers.
+// All functions are expected to be called back on the thread that created
+// the Worker object, unless noted.
+class WebCommonWorkerClient {
+public:
+    virtual void postExceptionToWorkerObject(
+        const WebString& errorString, int lineNumber,
+        const WebString& sourceURL) = 0;
+
+    virtual void postConsoleMessageToWorkerObject(
+        int destinationIdentifier,
+        int sourceIdentifier,
+        int messageType,
+        int messageLevel,
+        const WebString& message,
+        int lineNumber,
+        const WebString& sourceURL) = 0;
+
+    virtual void workerContextClosed() = 0;
+    virtual void workerContextDestroyed() = 0;
+
+    // Returns the notification presenter for this worker context.  Pointer
+    // is owned by the object implementing WebCommonWorkerClient.
+    virtual WebNotificationPresenter* notificationPresenter() = 0;
+
+    // This can be called on any thread to create a nested WebWorker.
+    // WebSharedWorkers are not instantiated via this API - instead
+    // they are created via the WebSharedWorkerRepository.
+    virtual WebWorker* createWorker(WebWorkerClient* client) = 0;
+
+protected:
+    ~WebCommonWorkerClient() { }
+};
+
+} // namespace WebKit
+
+#endif