Update VideoDecode PPAPI structs to be consistent with media structures, part 1

ppapi/c/dev/ppb_video_decoder_dev.h

Index: ppapi/c/dev/ppb_video_decoder_dev.h
diff --git a/ppapi/c/dev/ppb_video_decoder_dev.h b/ppapi/c/dev/ppb_video_decoder_dev.h
index 9e9d2396b5be14263c36e129eab6ea153d721386..7e896189debc7e62f5eaf43103ade03ebf37c27b 100644
--- a/ppapi/c/dev/ppb_video_decoder_dev.h
+++ b/ppapi/c/dev/ppb_video_decoder_dev.h
@@ -143,7 +143,7 @@ struct PPB_VideoDecoder_Dev {
   //   processed.
   void (*AssignPictureBuffer)(PP_Resource video_decoder,
                               uint32_t no_of_buffers,
-                              union PP_PictureData_Dev* picture_buffer);
+                              struct PP_PictureBuffer_Dev* picture_buffers);
 
   // Tells the decoder to reuse given picture buffer. Typical use of this
   // function is to call from PictureReady callback to recycle picture buffer
@@ -163,7 +163,7 @@ struct PPB_VideoDecoder_Dev {
   //   |picture_buffer| contains the reference to the picture buffer that was
   //   processed.
   void (*ReusePictureBuffer)(PP_Resource video_decoder,
-                             union PP_PictureData_Dev* picture_buffer);
+                             int32_t picture_buffer_id);
 
   // Dispatches flushing request to the decoder to flush both input and output
   // buffers. Successful flushing will result in output of the pictures and