Remove built-in identifier 'negate' from VM

runtime/vm/ast_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 #include "vm/ast.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 28 matching lines @@
       new LiteralNode(Scanner::kDummyTokenIndex, Smi::ZoneHandle(Smi::New(3)));
   EXPECT(l->literal().IsSmi());
   EXPECT_EQ(Smi::New(3), l->literal().raw());
 
   BinaryOpNode* b =
       new BinaryOpNode(Scanner::kDummyTokenIndex, Token::kADD, l, lln);
   EXPECT_EQ(Token::kADD, b->kind());
   EXPECT_EQ(l, b->left());
   EXPECT_EQ(lln, b->right());
 
-  UnaryOpNode* u = new UnaryOpNode(Scanner::kDummyTokenIndex, Token::kSUB, b);
-  EXPECT_EQ(Token::kSUB, u->kind());
+  UnaryOpNode* u =
+      new UnaryOpNode(Scanner::kDummyTokenIndex, Token::kNEGATE, b);
+  EXPECT_EQ(Token::kNEGATE, u->kind());
   EXPECT_EQ(b, u->operand());
 
   SequenceNode* sequence_node = new SequenceNode(1, new LocalScope(NULL, 0, 0));
   LiteralNode* literal_node = new LiteralNode(2,  Smi::ZoneHandle(Smi::New(3)));
   ReturnNode* return_node = new ReturnNode(3, literal_node);
   sequence_node->Add(return_node);
   GrowableArray<AstNode*> nodes;
   sequence_node->CollectAllNodes(&nodes);
   EXPECT_EQ(3, nodes.length());
 }
 
 }  // namespace dart