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

ppapi/examples/gles2/gles2.cc

Index: ppapi/examples/gles2/gles2.cc
diff --git a/ppapi/examples/gles2/gles2.cc b/ppapi/examples/gles2/gles2.cc
index 220a6f4493a3039560085ca020c867b6485ac4e7..eb8d8032728036e68b3f7c5875cd5319780349b2 100644
--- a/ppapi/examples/gles2/gles2.cc
+++ b/ppapi/examples/gles2/gles2.cc
@@ -155,9 +155,9 @@ class GLES2DemoInstance : public pp::Instance,
   pp::CompletionCallbackFactory<GLES2DemoInstance> callback_factory_;
 
   // Unowned pointers.
-  const struct PPB_Console_Dev* console_if_;
-  const struct PPB_Core* core_if_;
-  const struct PPB_OpenGLES2* gles2_if_;
+  const PPB_Console_Dev* console_if_;
+  const PPB_Core* core_if_;
+  const PPB_OpenGLES2* gles2_if_;
 
   // Owned data.
   pp::Graphics3D* context_;
@@ -197,11 +197,11 @@ GLES2DemoInstance::GLES2DemoInstance(PP_Instance instance, pp::Module* module)
       swap_ticks_(0),
       callback_factory_(this),
       context_(NULL) {
-  assert((console_if_ = static_cast<const struct PPB_Console_Dev*>(
+  assert((console_if_ = static_cast<const PPB_Console_Dev*>(
       module->GetBrowserInterface(PPB_CONSOLE_DEV_INTERFACE))));
-  assert((core_if_ = static_cast<const struct PPB_Core*>(
+  assert((core_if_ = static_cast<const PPB_Core*>(
       module->GetBrowserInterface(PPB_CORE_INTERFACE))));
-  assert((gles2_if_ = static_cast<const struct PPB_OpenGLES2*>(
+  assert((gles2_if_ = static_cast<const PPB_OpenGLES2*>(
       module->GetBrowserInterface(PPB_OPENGLES2_INTERFACE))));
 }