Add Promises for EME (Chromium side)

ppapi/thunk/ppb_instance_api.h

Index: ppapi/thunk/ppb_instance_api.h
diff --git a/ppapi/thunk/ppb_instance_api.h b/ppapi/thunk/ppb_instance_api.h
index 23bf18c112a092952a35f50fcfc53f83448dccfa..11d47265dcc3941fd22e19ee3bcf3ffdfed56744 100644
--- a/ppapi/thunk/ppb_instance_api.h
+++ b/ppapi/thunk/ppb_instance_api.h
@@ -146,19 +146,28 @@ class PPB_Instance_API {
                                 PP_URLComponents_Dev* components) = 0;
 #if !defined(OS_NACL)
   // Content Decryptor.
-  virtual void SessionCreated(PP_Instance instance,
-                              uint32_t session_id,
-                              PP_Var web_session_id) = 0;
+  virtual void PromiseResolved(PP_Instance instance, uint32 promise_id) = 0;
+  virtual void PromiseResolvedWithSession(PP_Instance instance,
+                                          uint32 promise_id,
+                                          PP_Var web_session_id_var) = 0;
+  virtual void PromiseRejected(PP_Instance instance,
+                               uint32 promise_id,
+                               PP_Var error_name_var,
+                               uint32 system_code,
+                               PP_Var error_description_var) = 0;
   virtual void SessionMessage(PP_Instance instance,
-                              uint32_t session_id,
-                              PP_Var message,
-                              PP_Var destination_url) = 0;
-  virtual void SessionReady(PP_Instance instance, uint32_t session_id) = 0;
-  virtual void SessionClosed(PP_Instance instance, uint32_t session_id) = 0;
+                              PP_Var web_session_id_var,
+                              PP_Var message_var,
+                              PP_Var destination_url_var) = 0;
+  virtual void SessionReady(PP_Instance instance,
+                            PP_Var web_session_id_var) = 0;
+  virtual void SessionClosed(PP_Instance instance,
+                             PP_Var web_session_id_var) = 0;
   virtual void SessionError(PP_Instance instance,
-                            uint32_t session_id,
-                            int32_t media_error,
-                            uint32_t system_code) = 0;
+                            PP_Var web_session_id_var,
+                            PP_Var error_name_var,
+                            uint32 system_code,
+                            PP_Var error_description_var) = 0;
   virtual void DeliverBlock(PP_Instance instance,
                             PP_Resource decrypted_block,
                             const PP_DecryptedBlockInfo* block_info) = 0;