transfor setter improvements

Author: youennf

index.bs

@@ -211,18 +211,17 @@ The <dfn attribute for="RTCRtpSender,RTCRtpReceiver">transform</dfn> getter step
 1. Return [=this=].`[[transform]]`.
 
 The `transform` setter steps are:
-1. Let |rtcObject| be the {{RTCRtpReceiver}} or {{RTCRtpSender}} on which the setter is invoked.
 2. Let |transform| be the argument to the setter.
 3. Let |checkedTransform| set to |transform| if it is not null or to an [=identity transform stream=] otherwise.
 3. Let |reader| be the result of [=ReadableStream/getting a reader=] for |checkedTransform|.`[[readable]]`.
 4. Let |writer| be the result of [=WritableStream/getting a writer=] for |checkedTransform|.`[[writable]]`.
 5. Initialize |newPipeToController| to a new {{AbortController}}.
-6. If |rtcObject|.`[[pipeToController]]` is not null, run the following steps:
-    1. [=AbortSignal/Add=] the [=chain transform algorithm=] to |rtcObject|.`[[pipeToController]]`:
-    2. [=AbortSignal/signal abort=] |rtcObject|.`[[pipeToController]]`.
+6. If [=this=].`[[pipeToController]]` is not null, run the following steps:
+    1. [=AbortSignal/Add=] the [=chain transform algorithm=] to [=this=].`[[pipeToController]]`.signal.
+    2. [=AbortSignal/signal abort=] [=this=].`[[pipeToController]]`.signal.
 7. Else, run the [=chain transform algorithm=] steps.
-8. Set |rtcObject|.`[[pipeToController]]` to |newPipeToController|.
-9. Set |rtcObject|.`[[transform]]` to |transform|.
+8. Set [=this=].`[[pipeToController]]` to |newPipeToController|.
+9. Set [=this=].`[[transform]]` to |transform|.
 
 The <dfn>chain transform algorithm</dfn> steps are defined as:
 1. If |newPipeToController|'s [=AbortSignal/aborted flag=] is true, abort these steps.