Add version-specific defines for each C interface.

ppapi/c/dev/ppb_cursor_control_dev.h

 /* Copyright (c) 2011 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.
  */
 #ifndef PPAPI_C_DEV_PPB_CURSOR_CONTROL_DEV_H_
 #define PPAPI_C_DEV_PPB_CURSOR_CONTROL_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/dev/pp_cursor_type_dev.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_point.h"
 #include "ppapi/c/pp_resource.h"
 
-#define PPB_CURSOR_CONTROL_DEV_INTERFACE "PPB_CursorControl(Dev);0.4"
+#define PPB_CURSOR_CONTROL_DEV_INTERFACE_0_4 "PPB_CursorControl(Dev);0.4"
+#define PPB_CURSOR_CONTROL_DEV_INTERFACE PPB_CURSOR_CONTROL_DEV_INTERFACE_0_4
 
 struct PPB_CursorControl_Dev {
   // Set a cursor.  If "type" is PP_CURSORTYPE_CUSTOM, then "custom_image"
   // must be an ImageData resource containing the cursor and "hot_spot" must
   // contain the offset within that image that refers to the cursor's position.
   PP_Bool (*SetCursor)(PP_Instance instance,
                        enum PP_CursorType_Dev type,
                        PP_Resource custom_image,
                        const struct PP_Point* hot_spot);
 
@@ skipping 23 matching lines @@
 
   // Returns PP_TRUE if the cursor is locked, PP_FALSE otherwise.
   PP_Bool (*HasCursorLock)(PP_Instance);
 
   // Returns PP_TRUE if the cursor can be locked, PP_FALSE otherwise.
   PP_Bool (*CanLockCursor)(PP_Instance);
 };
 
 #endif  /* PPAPI_C_DEV_PPB_CURSOR_CONTROL_DEV_H_ */