[Interpreter] Adds delete operator to interpreter.

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 15ff07e93d056db3ce4624854a95045b75128c4e..9b9bc3a8c3dd3b9458f3b10a00e13067d1e5e9c6 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -160,6 +160,10 @@ class BytecodeArrayBuilder {
   BytecodeArrayBuilder& LogicalNot();
   BytecodeArrayBuilder& TypeOf();
 
+  // Deletes property from an object. This expects that accumulator contains
+  // the key to be deleted and the register contains a reference to the object.
+  BytecodeArrayBuilder& Delete(Register object, LanguageMode language_mode);
+
   // Tests.
   BytecodeArrayBuilder& CompareOperation(Token::Value op, Register reg,
                                          Strength strength);
@@ -206,6 +210,7 @@ class BytecodeArrayBuilder {
   static Bytecode BytecodeForLoadGlobal(LanguageMode language_mode);
   static Bytecode BytecodeForStoreGlobal(LanguageMode language_mode);
   static Bytecode BytecodeForCreateArguments(CreateArgumentsType type);
+  static Bytecode BytecodeForDelete(LanguageMode language_mode);
 
   static bool FitsInIdx8Operand(int value);
   static bool FitsInIdx8Operand(size_t value);