Mojo EDK: Introduce MojoQueryHandleSignalsState API

mojo/public/java/system/src/org/chromium/mojo/system/Handle.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.mojo.system;
 
-import org.chromium.mojo.system.Core.WaitResult;
+import org.chromium.mojo.system.Core.HandleSignalsState;
 
 import java.io.Closeable;
 
 /**
  * A generic mojo handle.
  */
 public interface Handle extends Closeable {
 
     /**
      * Closes the given |handle|.
      * <p>
      * Concurrent operations on |handle| may succeed (or fail as usual) if they happen before the
      * close, be cancelled with result |MojoResult.CANCELLED| if they properly overlap (this is
      * likely the case with |wait()|, etc.), or fail with |MojoResult.INVALID_ARGUMENT| if they
      * happen after.
      */
     @Override
     public void close();
 
     /**
-     * @see Core#wait(Handle, Core.HandleSignals, long)
+     * @return the last known signaling state of the handle.
      */
-    public WaitResult wait(Core.HandleSignals signals, long deadline);
+    public HandleSignalsState querySignalsState();
 
     /**
      * @return whether the handle is valid. A handle is valid until it has been explicitly closed or
      *         send through a message pipe via |MessagePipeHandle.writeMessage|.
      */
     public boolean isValid();
 
     /**
      * Converts this handle into an {@link UntypedHandle}, invalidating this handle.
      */
@@ skipping 11 matching lines @@
      */
     public Handle pass();
 
     /**
      * Releases the native handle backed by this {@link Handle}. The caller owns the handle and must
      * close it.
      */
     public int releaseNativeHandle();
 
 }