Add PPAPI decryptor interfaces.

ppapi/proxy/ppapi_messages.h

Index: ppapi/proxy/ppapi_messages.h
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index 20a33f32585ff5f70e04c2ac1f53c3ec33f67d1b..786053446e5793968622e82718dc70968e5f69ea 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -1027,6 +1027,40 @@ IPC_MESSAGE_ROUTED4(PpapiHostMsg_PPBInstance_UpdateSurroundingText,
                     std::string /* text */,
                     uint32_t /* caret */,
                     uint32_t /* anchor */)
+IPC_MESSAGE_ROUTED4(PpapiHostMsg_PPBInstance_NeedKey,
+                    PP_Instance /* instance */,
+                    ppapi::proxy::SerializedVar /* key_system */,
+                    ppapi::proxy::SerializedVar /* session_id */,
+                    ppapi::proxy::SerializedVar /* init_data */)
+IPC_MESSAGE_ROUTED3(PpapiHostMsg_PPBInstance_KeyAdded,
+                    PP_Instance /* instance */,
+                    ppapi::proxy::SerializedVar /* key_system */,
+                    ppapi::proxy::SerializedVar /* session_id */)
+IPC_MESSAGE_ROUTED5(PpapiHostMsg_PPBInstance_KeyMessage,
+                    PP_Instance /* instance */,
+                    ppapi::proxy::SerializedVar /* key_system */,
+                    ppapi::proxy::SerializedVar /* session_id */,
+                    ppapi::HostResource /* message */,
+                    ppapi::proxy::SerializedVar /* default_url */)
+IPC_MESSAGE_ROUTED5(PpapiHostMsg_PPBInstance_KeyError,
+                    PP_Instance /* instance */,
+                    ppapi::proxy::SerializedVar /* key_system */,
+                    ppapi::proxy::SerializedVar /* session_id */,
+                    int32_t /* media_error */,
+                    int32_t /* system_error */)
+IPC_MESSAGE_ROUTED3(PpapiHostMsg_PPBInstance_DeliverBlock,
+                    PP_Instance /* instance */,
+                    ppapi::HostResource /* decrypted_block */,
+                    uint64_t /* request_id */)
+IPC_MESSAGE_ROUTED3(PpapiHostMsg_PPBInstance_DeliverFrame,
+                    PP_Instance /* instance */,
+                    ppapi::HostResource /* decrypted_frame */,
+                    uint64_t /* request_id */)
+IPC_MESSAGE_ROUTED3(PpapiHostMsg_PPBInstance_DeliverSamples,
+                    PP_Instance /* instance */,
+                    ppapi::HostResource /* decrypted_samples */,
+                    uint64_t /* request_id */)
+
 
 // PPB_URLLoader.
 IPC_SYNC_MESSAGE_ROUTED1_1(PpapiHostMsg_PPBURLLoader_Create,