More multi-version support (part 2)

ppapi/generators/test_cgen_range/versions.idl

 /* 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.
  */
 
 /* File Comment. */
 
 label Chrome {
   M13 = 0.0,
   M14 = 1.0,
   M15 = 2.0
 };
 
-[version=0.0]
 describe {
-  /** Standard Ints. */
   int32_t;
 };
 
 
-/* Bogus Struct */
+/* Bogus Struct Foo */
 [version=0.0]
-struct PP_Size {
+struct Foo {
+  /**
+   * Comment for function x
+   */
+  [version=0.0] int32_t Foo(int32_t x);
+  /**
+   * Comment for function x,y
+   */
+  [version=1.0] int32_t Foo(int32_t x, int32_t y);
+  /**
+   * Comment for function x,y,z
+   */
+  [version=2.0] int32_t Foo(int32_t x, int32_t y, int32_t z);
+};
+
+
+/* Inherit revisions thanks to Foo */
+[version=0.0]
+interface Bar {
   /**
    * Comment for function
    */
-  [version=0.0] int32_t Foo(int32_t x);
-  /**
-   * Comment for function
-   */
-  [version=1.0] int32_t Foo(int32_t x, int32_t y);
-  /**
-   * Comment for function
-   */
-  [version=2.0] int32_t Foo(int32_t x, int32_t y, int32_t z);
+  int32_t UseFoo(Foo val);
 };