Add blink::WebWaitableEvent interface (blink side)

public/platform/WebWaitableEvent.h

 /*
- * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2014 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 WebSocketStreamHandle_h
-#define WebSocketStreamHandle_h
+#ifndef WebWaitableEvent_h
+#define WebWaitableEvent_h
 
 #include "WebCommon.h"
 
 namespace blink {
 
-class WebData;
-class WebSocketStreamHandleClient;
-class WebURL;
+// Provides a thread synchronization that can be used to allow one thread to
+// wait until another thread to finish some work.
+class BLINK_PLATFORM_EXPORT WebWaitableEvent {
+public:
+    virtual ~WebWaitableEvent() { }
 
-class WebSocketStreamHandle {
-public:
-    virtual ~WebSocketStreamHandle() { }
+    // Waits indefinitely for the event to be signaled.
+    virtual void wait() = 0;
 
-    // Connect new socket stream asynchronously.
-    virtual void connect(const WebURL&, WebSocketStreamHandleClient*) { }
-
-    // Send web socket frame data on the socket stream.
-    virtual bool send(const WebData&) { return false; }
-
-    // Close the socket stream.
-    virtual void close() { }
+    // Puts the event in the signaled state. Causing any thread blocked on Wait
+    // to be woken up. The event state is reset to non-signaled after
+    // a waiting thread has been released.
+    virtual void signal() = 0;
 };
 
 } // namespace blink
 
-#endif
+#endif // WebWaitableEvent_h