Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/c/ppb_graphics_2d.h

Index: ppapi/c/ppb_graphics_2d.h
diff --git a/ppapi/c/ppb_graphics_2d.h b/ppapi/c/ppb_graphics_2d.h
index bbacf2289cbd4ff11e3b620b714e61b1d1b26cdf..0cf7554016781f4b3d03d8b48a220222b60b8308 100644
--- a/ppapi/c/ppb_graphics_2d.h
+++ b/ppapi/c/ppb_graphics_2d.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From ppb_graphics_2d.idl modified Wed Aug 24 20:51:38 2011. */
+/* From ppb_graphics_2d.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_PPB_GRAPHICS_2D_H_
 #define PPAPI_C_PPB_GRAPHICS_2D_H_
@@ -35,7 +35,7 @@
 /**
  * <code>PPB_Graphics2D</code> defines the interface for a 2D graphics context.
  */
-struct PPB_Graphics2D {
+struct PPB_Graphics2D_1_0 {
   /**
    * Create() creates a 2D graphics context. The returned graphics context will
    * not be bound to the module instance on creation (call BindGraphics() on
@@ -256,6 +256,8 @@ struct PPB_Graphics2D {
   int32_t (*Flush)(PP_Resource graphics_2d,
                    struct PP_CompletionCallback callback);
 };
+
+typedef struct PPB_Graphics2D_1_0 PPB_Graphics2D;
 /**
  * @}
  */