Add EmbeddedWorker interfaces in Blink API

public/web/WebServiceWorkerContextClient.h

 /*
  * Copyright (C) 2013 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
@@ skipping 10 matching lines @@
  * 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 WorkerPermissionClient_h
-#define WorkerPermissionClient_h
+#ifndef WebServiceWorkerContextClient_h
+#define WebServiceWorkerContextClient_h
 
-#include "core/workers/WorkerClients.h"
-#include "wtf/Forward.h"
-
-namespace WebCore {
-class ExecutionContext;
-}
+#include "WebWorkerPermissionClientProxy.h"
 
 namespace blink {
 
-class WebFrame;
 class WebString;
-class WebWorkerPermissionClientProxy;
+class WebServiceWorkerContextProxy;
 
-class WorkerPermissionClient : public WebCore::Supplement<WebCore::WorkerClients> {
+// This interface is implemented by the client. It is suppoed to be created
+// on the main thread and then passed on to the worker thread to be owned
+// by a newly created WorkerGlobalScope. All methods of this class are
+// called on the worker thread.
+class WebServiceWorkerContextClient {
 public:
-    static PassOwnPtr<WorkerPermissionClient> create(PassOwnPtr<WebWorkerPermissionClientProxy>);
+    // A new WorkerGlobalScope is created and started to run on the
+    // worker thread.
+    // This also gives back a proxy to the client to talk to the
+    // newly created WorkerGlobalScope. The proxy is held by WorkerGlobalScope
+    // and should not be held by the caller. No proxy methods should be called
+    // after workerContextDestroyed() is called.
+    virtual void workerContextStarted(WebServiceWorkerContextProxy*) { }
 
-    virtual ~WorkerPermissionClient();
+    // WorkerGlobalScope.close() is called.
+    virtual void workerContextClosed() { }
 
-    bool allowDatabase(const WebString& name, const WebString& displayName, unsigned long estimatedSize);
-    bool allowFileSystem();
-    bool allowIndexedDB(const WebString& name);
+    // WorkerGlobalScope is destroyed. The client should clear the
+    // WebServiceWorkerGlobalScopeProxy when this is called.
+    virtual void workerContextDestroyed() { }
 
-    static const char* supplementName();
-    static WorkerPermissionClient* from(WebCore::ExecutionContext*);
-
-private:
-    explicit WorkerPermissionClient(PassOwnPtr<WebWorkerPermissionClientProxy>);
-
-    OwnPtr<WebWorkerPermissionClientProxy> m_proxy;
+    virtual void dispatchDevToolsMessage(const WebString&) { }
+    virtual void saveDevToolsAgentState(const WebString&) { }
 };
 
-void providePermissionClientToWorker(WebCore::WorkerClients*, PassOwnPtr<WebWorkerPermissionClientProxy>);
-
 } // namespace blink
 
-#endif // WorkerPermissionClient_h
+#endif // WebWorkerContextClient_h