[Interpreter] Fill out function prologue support.

src/ppc/builtins-ppc.cc

Index: src/ppc/builtins-ppc.cc
diff --git a/src/ppc/builtins-ppc.cc b/src/ppc/builtins-ppc.cc
index ce6aef78e3418d3673c1e0392e9aecca4fffd85f..e9df341ce97ea8f61a4797df2ddbd9301107e57a 100644
--- a/src/ppc/builtins-ppc.cc
+++ b/src/ppc/builtins-ppc.cc
@@ -908,17 +908,6 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   //    receiver with the global proxy when called as functions (without an
   //    explicit receiver object).
   //  - Code aging of the BytecodeArray object.
-  //  - Supporting FLAG_trace.
-  //
-  // The following items are also not done here, and will probably be done using
-  // explicit bytecodes instead:
-  //  - Allocating a new local context if applicable.
-  //  - Setting up a local binding to the this function, which is used in
-  //    derived constructors with super calls.
-  //  - Setting new.target if required.
-  //  - Dealing with REST parameters (only if
-  //    https://codereview.chromium.org/1235153006 doesn't land by then).
-  //  - Dealing with argument objects.
 
   // Perform stack guard check.
   {