Convert a few ppapi dev interfaces to IDL. NaCl has tests for these

ppapi/c/dev/ppb_memory_dev.h

Index: ppapi/c/dev/ppb_memory_dev.h
diff --git a/ppapi/c/dev/ppb_memory_dev.h b/ppapi/c/dev/ppb_memory_dev.h
index 34773bf79d0d3e5cd9406762ecde26ce5c5b11c5..56d6bc5f7e1b513c54406288a8a2dd976d3f3f9e 100644
--- a/ppapi/c/dev/ppb_memory_dev.h
+++ b/ppapi/c/dev/ppb_memory_dev.h
@@ -2,9 +2,13 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
+/* From dev/ppb_memory_dev.idl modified Thu Nov 17 09:45:57 2011. */
+
 #ifndef PPAPI_C_DEV_PPB_MEMORY_DEV_H_
 #define PPAPI_C_DEV_PPB_MEMORY_DEV_H_
 
+#include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_MEMORY_DEV_INTERFACE_0_1 "PPB_Memory(Dev);0.1"
@@ -12,15 +16,15 @@
 
 /**
  * @file
- * This file defines the PPB_Memory interface defined by the browser and
- * and containing pointers to functions related to memory management.
+ * This file defines the <code>PPB_Memory interface</code> for functions
+ * related to memory management.
  */
 
+
 /**
  * @addtogroup Interfaces
  * @{
  */
-
 /**
  * The PPB_Memory_Dev interface contains pointers to functions related to memory
  * management.
@@ -35,7 +39,6 @@ struct PPB_Memory_Dev {
    * allocation fails.
    */
   void* (*MemAlloc)(uint32_t num_bytes);
-
   /**
    * MemFree is a pointer to a function that deallocates memory.
    *
@@ -49,3 +52,4 @@ struct PPB_Memory_Dev {
  */
 
 #endif  /* PPAPI_C_DEV_PPB_MEMORY_DEV_H_ */
+