Change trusted shared memory interface to match audio....

ppapi/c/dev/ppb_buffer_dev.h

Index: ppapi/c/dev/ppb_buffer_dev.h
===================================================================
--- ppapi/c/dev/ppb_buffer_dev.h	(revision 67614)
+++ ppapi/c/dev/ppb_buffer_dev.h	(working copy)
@@ -10,13 +10,13 @@
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
-#define PPB_BUFFER_DEV_INTERFACE "PPB_Buffer(Dev);0.2"
+#define PPB_BUFFER_DEV_INTERFACE "PPB_Buffer(Dev);0.3"
 
 struct PPB_Buffer_Dev {
   // Allocates a buffer of the given size in bytes. The return value will have
   // a non-zero ID on success, or zero on failure. Failure means the module
   // handle was invalid. The buffer will be initialized to contain zeroes.
-  PP_Resource (*Create)(PP_Module module, int32_t size_in_bytes);
+  PP_Resource (*Create)(PP_Module module, uint32_t size_in_bytes);
 
   // Returns PP_TRUE if the given resource is a Buffer. Returns PP_FALSE if the
   // resource is invalid or some type other than a Buffer.
@@ -24,7 +24,7 @@
 
   // Gets the size of the buffer. Returns PP_TRUE on success, PP_FALSE
   // if the resource is not a buffer. On failure, |*size_in_bytes| is not set.
-  PP_Bool (*Describe)(PP_Resource resource, int32_t* size_in_bytes);
+  PP_Bool (*Describe)(PP_Resource resource, uint32_t* size_in_bytes);
 
   // Maps this buffer into the plugin address space and returns a pointer to the
   // beginning of the data.