Fix some types at the IPC layer. Sizes should be unsigned.

ppapi/c/dev/pp_video_dev.h

 /* Copyright (c) 2012 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 dev/pp_video_dev.idl modified Fri Jul 20 12:22:28 2012. */
+/* From dev/pp_video_dev.idl modified Fri Dec  7 15:33:11 2012. */
 
 #ifndef PPAPI_C_DEV_PP_VIDEO_DEV_H_
 #define PPAPI_C_DEV_PP_VIDEO_DEV_H_
 
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/c/pp_stdint.h"
 
 /**
@@ skipping 48 matching lines @@
    */
   int32_t id;
   /**
    * Buffer to hold the bitstream data. Should be allocated using the
    * PPB_Buffer interface for consistent interprocess behaviour.
    */
   PP_Resource data;
   /**
    * Size of the bitstream contained in buffer (in bytes).
    */
-  int32_t size;
+  uint32_t size;
 };
 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_VideoBitstreamBuffer_Dev, 12);
 
 /**
  * Struct for specifying texture-backed picture data.
  */
 struct PP_PictureBuffer_Dev {
   /**
    * Client-specified id for the picture buffer. By using this value client can
    * keep track of the buffers it has assigned to the video decoder and how they
@@ skipping 58 matching lines @@
    */
   PP_VIDEODECODERERROR_PLATFORM_FAILURE = 4
 } PP_VideoDecodeError_Dev;
 PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_VideoDecodeError_Dev, 4);
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_DEV_PP_VIDEO_DEV_H_ */