[POC-WIP] Link window focus tokens with ExecutionContext.

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 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 WebServiceWorkerContextClient_h
 #define WebServiceWorkerContextClient_h
 
 #include "WebWorkerPermissionClientProxy.h"
 #include "public/platform/WebMessagePortChannel.h"
+#include "public/platform/WebServiceWorkerClientFocusCallback.h"
 #include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
 #include "public/platform/WebServiceWorkerSkipWaitingCallbacks.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 class WebDataSource;
 class WebServiceWorkerCacheStorage;
 class WebServiceWorkerContextProxy;
@@ skipping 101 matching lines @@
     // passed to the WebServiceWorkerClientsCallbacks implementation.
     virtual void getClients(WebServiceWorkerClientsCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
 
     // Callee receives ownership of the passed vector.
     // FIXME: Blob refs should be passed to maintain ref counts. crbug.com/351753
     virtual void postMessageToClient(int clientID, const WebString&, WebMessagePortChannelArray*) { BLINK_ASSERT_NOT_REACHED(); }
 
     // Ownership of the passed callbacks is transferred to the callee, callee
     // should delete the callbacks after run.
     virtual void skipWaiting(WebServiceWorkerSkipWaitingCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
+
+    // Ownership of the passed callbacks is transferred to the callee, callee
+    // should delete the callback after calling either onSuccess or onError.
+    virtual void focus(int clientID, WebServiceWorkerClientFocusCallback* callback)
+    {
+        // FIXME: call BLINK_ASSERT_NOT_REACHED() when Chromium implementation
+        // is present. https://crbug.com/437149
+        bool result = true;
+        callback->onSuccess(&result);
+        delete callback;
+    }
 };
 
 } // namespace blink
 
 #endif // WebServiceWorkerContextClient_h