Ignore debug stepin in optimized code for array builtins.

src/hydrogen.cc

 // Copyright 2013 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 11134 matching lines @@
 }
 
 
 void HOptimizedGraphBuilder::GenerateDebugBreakInOptimizedCode(
     CallRuntime* call) {
   Add<HDebugBreak>();
   return ast_context()->ReturnValue(graph()->GetConstant0());
 }
 
 
+void HOptimizedGraphBuilder::GenerateDebugCallbackSupportsStepping(
+    CallRuntime* call) {
+  ASSERT(call->arguments()->length() == 1);
+  // Debugging is not supported in optimized code.
+  return ast_context()->ReturnValue(graph()->GetConstantFalse());
+}
+
+
 #undef CHECK_BAILOUT
 #undef CHECK_ALIVE
 
 
 HEnvironment::HEnvironment(HEnvironment* outer,
                            Scope* scope,
                            Handle<JSFunction> closure,
                            Zone* zone)
     : closure_(closure),
       values_(0, zone),
@@ skipping 613 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal