[interpreter] Support for ES6 class literals.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index da8db271712a3e2421a6f505972d3eed71b55ffa..9795b0835756e2e7ba91f0d1a5bbc06f3d3c08c0 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -326,6 +326,10 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::LoadBooleanConstant(bool value) {
   return *this;
 }
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::LoadPrototypeOrInitialMap() {
+  Output(Bytecode::kLdaInitialMap);
+  return *this;
+}
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadAccumulatorWithRegister(
     Register reg) {