Add support for generating thunk source from IDL.

ppapi/generators/test_thunk/simple_thunk.cc

Index: ppapi/generators/test_thunk/simple_thunk.cc
diff --git a/ppapi/generators/test_thunk/simple_thunk.cc b/ppapi/generators/test_thunk/simple_thunk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..735698a8d979dda5e49416adcb307dcfaf41c356
--- /dev/null
+++ b/ppapi/generators/test_thunk/simple_thunk.cc
@@ -0,0 +1,97 @@
+/* Copyright (c) 2012 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.
+ */
+
+/* From ../test_thunk/simple.idl modified Thu Nov 15 10:43:12 2012. */
+
+#include "ppapi/c/../test_thunk/simple.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_instance_api.h"
+#include "ppapi/thunk/resource_creation_api.h"
+#include "ppapi/thunk/simple_api.h"
+#include "ppapi/thunk/thunk.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+PP_Resource Create(PP_Instance instance) {
+  EnterResourceCreation enter(instance);
+  if (enter.failed())
+    return 0;
+  return enter.functions()->CreateSimple(instance);
+}
+
+PP_Bool IsSimple(PP_Resource resource) {
+  EnterResource<PPB_Simple_API> enter(resource, false);
+  return PP_FromBool(enter.succeeded());
+}
+
+void PostMessage(PP_Instance instance, PP_Var message) {
+  EnterInstance enter(instance);
+  if (enter.succeeded())
+    enter.functions()->PostMessage(instance, message);
+}
+
+uint32_t DoUint32Instance(PP_Instance instance) {
+  EnterInstance enter(instance);
+  if (enter.failed())
+    return 0;
+  return enter.functions()->DoUint32Instance(instance);
+}
+
+uint32_t DoUint32Resource(PP_Resource instance) {
+  EnterResource<PPB_Simple_API> enter(instance, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->DoUint32Resource();
+}
+
+uint32_t DoUint32ResourceNoErrors(PP_Resource instance) {
+  EnterResource<PPB_Simple_API> enter(instance, false);
+  if (enter.failed())
+    return 0;
+  return enter.object()->DoUint32ResourceNoErrors();
+}
+
+int32_t OnFailure12(PP_Instance instance) {
+  EnterInstance enter(instance);
+  if (enter.failed())
+    return 12;
+  return enter.functions()->OnFailure12(instance);
+}
+
+const PPB_Simple_0_5 g_ppb_simple_thunk_0_5 = {
+  &Create,
+  &IsSimple,
+  &PostMessage,
+  &DoUint32Instance,
+  &DoUint32Resource,
+  &DoUint32ResourceNoErrors,
+};
+
+const PPB_Simple_1_0 g_ppb_simple_thunk_1_0 = {
+  &Create,
+  &IsSimple,
+  &DoUint32Instance,
+  &DoUint32Resource,
+  &DoUint32ResourceNoErrors,
+  &OnFailure12,
+};
+
+}  // namespace
+
+const PPB_Simple_0_5* GetPPB_Simple_0_5_Thunk() {
+  return &g_ppb_simple_thunk_0_5;
+}
+
+const PPB_Simple_1_0* GetPPB_Simple_1_0_Thunk() {
+  return &g_ppb_simple_thunk_1_0;
+}
+
+}  // namespace thunk
+}  // namespace ppapi