Remove unused constructor BinaryOperation(Assignment* compound_assignment).

src/ast.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 319 matching lines @@
     case Token::DIV:
     case Token::MOD:
       return true;
     default:
       UNREACHABLE();
   }
   return false;
 }
 
 
-BinaryOperation::BinaryOperation(Assignment* assignment) {
-  ASSERT(assignment->is_compound());
-  op_ = assignment->binary_op();
-  left_ = assignment->target();
-  right_ = assignment->value();
-  pos_ = assignment->position();
-}
-
-
 // ----------------------------------------------------------------------------
 // Inlining support
 
 bool Declaration::IsInlineable() const {
   UNREACHABLE();
   return false;
 }
 
 
 bool TargetCollector::IsInlineable() const {
@@ skipping 786 matching lines @@
                        int pos)
     : label_(label),
       statements_(statements),
       position_(pos),
       compare_type_(NONE),
       compare_id_(AstNode::GetNextId()),
       entry_id_(AstNode::GetNextId()) {
 }
 
 } }  // namespace v8::internal