[interpreter] Remove BytecodeArrayBuilder::Illegal().

src/interpreter/bytecode-array-builder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecode-array-writer.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 214 matching lines @@
   BytecodeArrayBuilder& JumpIfNotHole(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfNull(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfUndefined(BytecodeLabel* label);
 
   BytecodeArrayBuilder& StackCheck(int position);
 
   BytecodeArrayBuilder& Throw();
   BytecodeArrayBuilder& ReThrow();
   BytecodeArrayBuilder& Return();
 
-  BytecodeArrayBuilder& Illegal();
-
   // Debugger.
   BytecodeArrayBuilder& Debugger();
 
   // Complex flow control.
   BytecodeArrayBuilder& ForInPrepare(Register cache_info_triple);
   BytecodeArrayBuilder& ForInDone(Register index, Register cache_length);
   BytecodeArrayBuilder& ForInNext(Register receiver, Register index,
                                   Register cache_type_array_pair,
                                   int feedback_slot);
   BytecodeArrayBuilder& ForInStep(Register index);
@@ skipping 80 matching lines @@
 
   // Attach latest source position to |node|.
   void AttachSourceInfo(BytecodeNode* node);
 
   // Set position for return.
   void SetReturnPosition();
 
   // Gets a constant pool entry for the |object|.
   size_t GetConstantPoolEntry(Handle<Object> object);
 
+  // Not implemented as the illegal bytecode is used inside internally
+  // to indicate a bytecode field is not valid or an error has occured
+  // during bytecode generation.
+  BytecodeArrayBuilder& Illegal();
+
   Isolate* isolate() const { return isolate_; }
   BytecodeArrayWriter* bytecode_array_writer() {
     return &bytecode_array_writer_;
   }
   BytecodePipelineStage* pipeline() { return pipeline_; }
   ConstantArrayBuilder* constant_array_builder() {
     return &constant_array_builder_;
   }
   const ConstantArrayBuilder* constant_array_builder() const {
     return &constant_array_builder_;
@@ skipping 64 matching lines @@
   size_t offset_;
 
   friend class BytecodeArrayBuilder;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_