Apply suggestions from code review

Co-authored-by: Boris Zbarsky <bzbarsky@apple.com>

Author: nivi-apple

src/protocols/bdx/AsyncTransferFacilitator.cpp

@@ -34,7 +34,6 @@ void AsyncTransferFacilitator::Reset()
 
 CHIP_ERROR AsyncTransferFacilitator::SendMessage(TransferSession::OutputEvent & event)
 {
-
     VerifyOrReturnError(mExchange, CHIP_ERROR_INCORRECT_STATE);
 
     Messaging::SendFlags sendFlags;

src/protocols/bdx/AsyncTransferFacilitator.h

@@ -51,13 +51,9 @@ class AsyncTransferFacilitator : public Messaging::ExchangeDelegate
     virtual void HandleTransferSessionOutput(TransferSession::OutputEvent & event) = 0;
 
     /**
-     * This method should be implemented to clean up and destroy the instance of the sub class
-     * implemeting it and the base class.
-     *
-     * Note: After this method has been called, we can't use the instance of the subclass that
-     * implements this.
+     * This method should be implemented to destroy the object subclassing AsyncTransferFacilitator.
      */
-    virtual void CleanUp() = 0;
+    virtual void DestroySelf() = 0;
 
 protected:
     CHIP_ERROR OnMessageReceived(Messaging::ExchangeContext * ec, const PayloadHeader & payloadHeader,
@@ -67,7 +63,7 @@ class AsyncTransferFacilitator : public Messaging::ExchangeDelegate
 
     CHIP_ERROR SendMessage(TransferSession::OutputEvent & event);
 
-    // The transfer session coresponding to this AsynTransferFacilitator object.
+    // The transfer session coresponding to this AsyncTransferFacilitator object.
     TransferSession mTransfer;
 
     // The Exchange holder that holds the exchange context used for BDX messages.
@@ -84,10 +80,10 @@ class AsyncTransferFacilitator : public Messaging::ExchangeDelegate
 /**
  * An AsyncTransferFacilitator that is initialized to respond to an incoming BDX transfer request.
  *
- * Provides a method for initializing the TransferSession member but still needs to be extended to implement
+ * Provides a method for initializing the TransferSession members but still needs to be extended to implement
  * HandleTransferSessionOutput.
  *
- * This class, or a subclass of it, should be used as the exchange delegate for a BDX transfer.
+ * An instance of some subclass of this class, should be used as the exchange delegate for a BDX transfer.
  */
 class AsyncResponder : public AsyncTransferFacilitator
 {