Expose the ServiceWorker's v8 context to embedders.

public/web/WebServiceWorkerContextProxy.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 15 matching lines @@
  * 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 WebServiceWorkerContextProxy_h
 #define WebServiceWorkerContextProxy_h
 
 #include "public/platform/WebMessagePortChannel.h"
 
+namespace v8 {
+class Context;
+class Isolate;
+template <class T>
+class Handle;
+}
+
 namespace blink {
 
 class WebServiceWorkerRequest;
 class WebString;
 
 // A proxy interface to talk to the worker's GlobalScope implementation.
 // All methods of this class must be called on the worker thread.
 class WebServiceWorkerContextProxy {
 public:
     virtual ~WebServiceWorkerContextProxy() { }
 
     virtual void dispatchActivateEvent(int eventID) = 0;
     // FIXME: This needs to pass the active service worker info.
     virtual void dispatchInstallEvent(int installEventID) = 0;
     virtual void dispatchFetchEvent(int fetchEventID, const WebServiceWorkerRequest& webRequest) = 0;
 
     virtual void dispatchMessageEvent(const WebString& message, const WebMessagePortChannelArray& channels) = 0;
 
     virtual void dispatchPushEvent(int eventID, const WebString& data) = 0;
 
     // Once the ServiceWorker has finished handling the sync event
     // didHandleSyncEvent is called on the context client.
     virtual void dispatchSyncEvent(int syncEventID) = 0;
+
+    // Returns the raw v8 context for the Service Worker. This must be called
+    // with an active HandleScope, and the handle is non-null in non-cleanup
+    // tasks from workerContextStarted() to willDestroyWorkerContext().
+    virtual v8::Handle<v8::Context> v8Context() = 0;
 };
 
 } // namespace blink
 
 #endif // WebServiceWorkerContextProxy_h