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 db73979e4e56c5ff1932e3f5d1146d2f73a7fcd7..217cf97ea5758577501e8e534fc52c195b8808fe 100644
--- a/ppapi/thunk/ppb_instance_api.h
+++ b/ppapi/thunk/ppb_instance_api.h
@@ -149,19 +149,28 @@ 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_ExceptionCode exception_code,
+                               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_ExceptionCode exception_code,
+                            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;