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

ppapi/tests/test_websocket.h

Index: ppapi/tests/test_websocket.h
diff --git a/ppapi/tests/test_websocket.h b/ppapi/tests/test_websocket.h
index 1f16489352f6a36c32b036f4d4c7c0bfb09ad7c1..600c23ff760cf4d21be458a435d0736f66a21c5e 100644
--- a/ppapi/tests/test_websocket.h
+++ b/ppapi/tests/test_websocket.h
@@ -7,13 +7,12 @@
 
 #include <string>
 
+#include "ppapi/c/dev/ppb_var_array_buffer_dev.h"
+#include "ppapi/c/dev/ppb_websocket_dev.h"
+#include "ppapi/c/ppb_core.h"
+#include "ppapi/c/ppb_var.h"
 #include "ppapi/tests/test_case.h"
 
-struct PPB_Core;
-struct PPB_Var;
-struct PPB_VarArrayBuffer_Dev;
-struct PPB_WebSocket_Dev;
-
 class TestWebSocket : public TestCase {
  public:
   explicit TestWebSocket(TestingInstance* instance) : TestCase(instance) {}