[PPAPI][MediaStream] Support configure for video input.

ppapi/c/ppb_media_stream_video_track.h

 /* 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.
  */
 
-/* From ppb_media_stream_video_track.idl modified Thu Jan 23 14:09:56 2014. */
+/* From ppb_media_stream_video_track.idl modified Fri Feb 14 11:36:17 2014. */
 
 #ifndef PPAPI_C_PPB_MEDIA_STREAM_VIDEO_TRACK_H_
 #define PPAPI_C_PPB_MEDIA_STREAM_VIDEO_TRACK_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
@@ skipping 87 matching lines @@
    * @param[in] video_track A <code>PP_Resource</code> corresponding to a video
    * resource.
    * @param[in] attrib_list A list of attribute name-value pairs in which each
    * attribute is immediately followed by the corresponding desired value.
    * The list is terminated by
    * <code>PP_MEDIASTREAMVIDEOTRACK_ATTRIB_NONE</code>.
    * @param[in] callback <code>PP_CompletionCallback</code> to be called upon
    * completion of <code>Configure()</code>.
    *
    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
+   * Returns <code>PP_ERROR_INPROGRESS</code> if there is a pending call of
+   * <code>Configure()</code> or <code>GetFrame()</code>, or the plugin
+   * holds some frames which are not recycled with <code>RecycleFrame()</code>.
    */
   int32_t (*Configure)(PP_Resource video_track,
                        const int32_t attrib_list[],
                        struct PP_CompletionCallback callback);
   /**
    * Gets attribute value for a given attribute name.
    *
    * @param[in] video_track A <code>PP_Resource</code> corresponding to a video
    * resource.
    * @param[in] attrib A <code>PP_MediaStreamVideoTrack_Attrib</code> for
@@ skipping 73 matching lines @@
    * MediaStream video track resource.
    */
   void (*Close)(PP_Resource video_track);
 };
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_MEDIA_STREAM_VIDEO_TRACK_H_ */