[turbofan] Remove virtual methods from CodeAssembler.

src/interpreter/interpreter-assembler.cc

Index: src/interpreter/interpreter-assembler.cc
diff --git a/src/interpreter/interpreter-assembler.cc b/src/interpreter/interpreter-assembler.cc
index 67c5638e2942756349cf83d59a8a6e7e41cacf5d..c143751b3499a0e3bc3ebcf89dc9ddef9f7c0856 100644
--- a/src/interpreter/interpreter-assembler.cc
+++ b/src/interpreter/interpreter-assembler.cc
@@ -42,6 +42,8 @@ InterpreterAssembler::InterpreterAssembler(CodeAssemblerState* state,
   if (FLAG_trace_ignition) {
     TraceBytecode(Runtime::kInterpreterTraceBytecodeEntry);
   }
+  RegisterCallGenerationCallbacks([this] { CallPrologue(); },
+                                  [this] { CallEpilogue(); });
 }
 
 InterpreterAssembler::~InterpreterAssembler() {
@@ -49,6 +51,7 @@ InterpreterAssembler::~InterpreterAssembler() {
   // accumulator in the way described in the bytecode definitions in
   // bytecodes.h.
   DCHECK_EQ(accumulator_use_, Bytecodes::GetAccumulatorUse(bytecode_));
+  UnregisterCallGenerationCallbacks();
 }
 
 Node* InterpreterAssembler::GetInterpretedFramePointer() {