Add PPAPI decryptor interfaces.

ppapi/thunk/ppb_content_decryption_module_thunk.cc

Index: ppapi/thunk/ppb_content_decryption_module_thunk.cc
diff --git a/ppapi/thunk/ppb_content_decryption_module_thunk.cc b/ppapi/thunk/ppb_content_decryption_module_thunk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..84b26c8096943b6d38108f186a7b355fc12cda20
--- /dev/null
+++ b/ppapi/thunk/ppb_content_decryption_module_thunk.cc
@@ -0,0 +1,73 @@
+// 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.
+
+#include "ppapi/c/dev/ppb_content_decryption_module_dev.h"
+#include "ppapi/thunk/thunk.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_instance_api.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+void NeedKey(PP_Instance instance,
+             PP_Var key_system,
+             PP_Var session_id,
+             PP_Resource init_data) {
+}
+
+void KeyAdded(PP_Instance instance,
+              PP_Var key_system,
+              PP_Var session_id) {
+}
+
+void KeyMessage(PP_Instance instance,
+                PP_Var key_system,
+                PP_Var session_id,
+                PP_Resource message,
+                PP_Var default_url) {
+}
+
+void KeyError(PP_Instance instance,
+              PP_Var key_system,
+              PP_Var session_id,
+              uint16_t media_error,
+              uint16_t system_error) {
+}
+
+void DeliverBlock(PP_Instance instance,
+                  PP_Resource decrypted_block,
+                  PP_CompletionCallback callback) {
+}
+
+void DeliverFrame(PP_Instance instance,
+                  PP_Resource decrypted_frame,
+                  PP_CompletionCallback callback) {
+}
+
+void DeliverSamples(PP_Instance instance,
+                    PP_Resource decrypted_samples,
+                    PP_CompletionCallback callback) {
+}
+
+const PPB_ContentDecryptionModule_Dev g_ppb_decryption_thunk = {
+  &NeedKey,
+  &KeyAdded,
+  &KeyMessage,
+  &KeyError,
+  &DeliverBlock,
+  &DeliverFrame,
+  &DeliverSamples
+};
+
+}  // namespace
+
+const PPB_ContentDecryptionModule_Dev*
+    GetPPB_ContentDecryptionModule_Dev_0_1_Thunk() {
+  return &g_ppb_decryption_thunk;
+}
+
+}  // namespace thunk
+}  // namespace ppapi