Update PPB_VideoDecoder documentation.

ppapi/c/ppb_video_decoder.h

Index: ppapi/c/ppb_video_decoder.h
diff --git a/ppapi/c/ppb_video_decoder.h b/ppapi/c/ppb_video_decoder.h
index f09908c222ff31ddef42233c324517f260a66092..a1e9044eb904a7012f525de2a32abcbd923e4b59 100644
--- a/ppapi/c/ppb_video_decoder.h
+++ b/ppapi/c/ppb_video_decoder.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From ppb_video_decoder.idl modified Tue May  6 05:19:45 2014. */
+/* From ppb_video_decoder.idl modified Mon May 19 18:06:32 2014. */
 
 #ifndef PPAPI_C_PPB_VIDEO_DECODER_H_
 #define PPAPI_C_PPB_VIDEO_DECODER_H_
@@ -100,9 +100,8 @@ struct PPB_VideoDecoder_0_1 { /* dev */
                         struct PP_CompletionCallback callback);
   /**
    * Decodes a bitstream buffer. Copies |size| bytes of data from the plugin's
-   * |buffer|. The plugin should maintain the buffer and not call Decode() again
-   * until the decoder signals completion by returning PP_OK or by running
-   * |callback|.
+   * |buffer|. The plugin should wait until the decoder signals completion by
+   * returning PP_OK or by running |callback| before calling Decode() again.
    *
    * In general, each bitstream buffer should contain a demuxed bitstream frame
    * for the selected video codec. For example, H264 decoders expect to receive