Remove builtin/runtime name clash presubmit check.

src/parser.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/parser.h"
 
 #include "src/api.h"
 #include "src/ast.h"
 #include "src/ast-literal-reindexer.h"
 #include "src/bailout-reason.h"
@@ skipping 4721 matching lines @@
 
   if (extension_ != NULL) {
     // The extension structures are only accessible while parsing the
     // very first time not when reparsing because of lazy compilation.
     scope_->DeclarationScope()->ForceEagerCompilation();
   }
 
   const Runtime::Function* function = Runtime::FunctionForName(name->string());
 
   if (function != NULL) {
+    // Check for possible name clash.
+    DCHECK_EQ(Context::kNotFound,
+              Context::IntrinsicIndexForName(name->string()));
     // Check for built-in IS_VAR macro.
     if (function->function_id == Runtime::kIS_VAR) {
       DCHECK_EQ(Runtime::RUNTIME, function->intrinsic_type);
       // %IS_VAR(x) evaluates to x if x is a variable,
       // leads to a parse error otherwise.  Could be implemented as an
       // inline function %_IS_VAR(x) to eliminate this special case.
       if (args->length() == 1 && args->at(0)->AsVariableProxy() != NULL) {
         return args->at(0);
       } else {
         ReportMessage(MessageTemplate::kNotIsvar);
@@ skipping 1351 matching lines @@
 
 Expression* Parser::SpreadCallNew(Expression* function,
                                   ZoneList<v8::internal::Expression*>* args,
                                   int pos) {
   args->InsertAt(0, function, zone());
 
   return factory()->NewCallRuntime(Context::REFLECT_CONSTRUCT_INDEX, args, pos);
 }
 }  // namespace internal
 }  // namespace v8