Revert of Parse arrow functions at proper precedence level

src/full-codegen/full-codegen.cc

 // Copyright 2012 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.
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
 #include "src/debug/debug.h"
@@ skipping 1382 matching lines @@
   entry->range_end = masm()->pc_offset();
 
   // Drop context from operand stack.
   __ Drop(TryBlockConstant::kElementCount);
 }
 
 
 void FullCodeGenerator::VisitSpread(Spread* expr) { UNREACHABLE(); }
 
 
-void FullCodeGenerator::VisitEmptyParentheses(EmptyParentheses* expr) {
-  UNREACHABLE();
-}
-
-
 FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
     int* stack_depth, int* context_length) {
   // The macros used here must preserve the result register.
 
   // Because the handler block contains the context of the finally
   // code, we can restore it directly from there for the finally code
   // rather than iteratively unwinding contexts via their previous
   // links.
   if (*context_length > 0) {
     __ Drop(*stack_depth);  // Down to the handler block.
@@ skipping 171 matching lines @@
   codegen_->PrepareForBailoutForId(exit_id_, NO_REGISTERS);
   codegen_->scope_ = saved_scope_;
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8