Add blink::WebWaitableEvent interface (blink side)

public/platform/WebWaitableEvent.h

Index: public/platform/WebWaitableEvent.h
diff --git a/public/platform/WebSocketStreamHandle.h b/public/platform/WebWaitableEvent.h
similarity index 70%
copy from public/platform/WebSocketStreamHandle.h
copy to public/platform/WebWaitableEvent.h
index 60a469ac2a09d561bdd05015bf603a8dc62c0f0f..2b44d7b1b747fcce048d2a0c6f2d218363136b76 100644
--- a/public/platform/WebSocketStreamHandle.h
+++ b/public/platform/WebWaitableEvent.h
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -28,31 +28,28 @@
  * 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;
-
-class WebSocketStreamHandle {
+// 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 ~WebSocketStreamHandle() { }
-
-    // Connect new socket stream asynchronously.
-    virtual void connect(const WebURL&, WebSocketStreamHandleClient*) { }
+    virtual ~WebWaitableEvent() { }
 
-    // Send web socket frame data on the socket stream.
-    virtual bool send(const WebData&) { return false; }
+    // Waits indefinitely for the event to be signaled.
+    virtual void wait() = 0;
 
-    // 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