[PPAPI] API thunk for video media stream track.

ppapi/api/ppb_media_stream_video_track.idl

 /* 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.
  */
 
 /**
  * Defines the <code>PPB_MediaStreamVideoTrack</code> interface. Used for
  * receiving video frames from a MediaStream video track in the browser.
  * This interface is still in development (Dev API status) and may change.
  */
+
+[generate_thunk]
+
 label Chrome {
   [channel=dev] M34 = 0.1
 };
 
 /**
  */
 interface PPB_MediaStreamVideoTrack {
   /**
    * Determines if a resource is a MediaStream video track resource.
    *
@@ skipping 37 matching lines @@
   /**
    * Checks whether the underlying MediaStream track has ended.
    * Calls to GetFrame while the track has ended are safe to make and will
    * complete, but will fail.
    *
    * @param[in] video_track The <code>PP_Resource</code> to check.
    *
    * @return A <code>PP_Bool</code> with <code>PP_TRUE</code> if the given
    * MediaStream track has ended or <code>PP_FALSE</code> otherwise.
    */
+  [on_failure=PP_TRUE]
   PP_Bool HasEnded([in] PP_Resource video_track);
 
   /**
    * Gets the next video frame from the MediaStream track.
    * If internal processing is slower than the incoming frame rate, new frames
    * will be dropped from the incoming stream. Once the input buffer is full,
    * frames will be dropped until <code>RecycleFrame()</code> is called to free
    * a spot for another frame to be buffered.
    * If there are no frames in the input buffer,
    * <code>PP_OK_COMPLETIONPENDING</code> will be returned immediately and the
    * <code>callback</code> will be called, when a new frame is received or an

[bbudge, 2014/01/09 18:55:26]

nit: remove the comma here to improve readability.

[Peng, 2014/01/09 19:09:38]

Done.

    * error happens.
-   * If the caller holds a frame returned by the previous call of
-   * <code>GetFrame()</code>, <code>PP_ERROR_INPROGRESS</code> will be returned.
-   * The caller should recycle the previous frame before getting the next frame.
    *
    * @param[in] video_track A <code>PP_Resource</code> corresponding to a video
    * resource.
    * @param[out] frame A <code>PP_Resource</code> corresponding to a VideoFrame
    * resource.
    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
    * completion of GetFrame().
    *
    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
    * Returns PP_ERROR_NOMEMORY if <code>max_buffered_frames</code> frames buffer
@@ skipping 22 matching lines @@
   /**
    * Closes the MediaStream video track and disconnects it from video source.
    * After calling <code>Close()</code>, no new frames will be received.
    *
    * @param[in] video_track A <code>PP_Resource</code> corresponding to a
    * MediaStream video track resource.
    */
   void Close([in] PP_Resource video_track);
 };