[es6] Implement spec compliant ToPrimitive in the runtime.

src/debug/debug.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/debug/debug.h"
 
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 2130 matching lines @@
       Handle<Object> is_running_args[] = { answer };
       maybe_result = Execution::Call(
           isolate_, is_running, cmd_processor, 1, is_running_args);
       Handle<Object> result;
       if (!maybe_result.ToHandle(&result)) break;
       running = result->IsTrue();
     } else {
       Handle<Object> exception;
       if (!maybe_exception.ToHandle(&exception)) break;
       Handle<Object> result;
-      if (!Execution::ToString(isolate_, exception).ToHandle(&result)) break;
+      if (!Object::ToString(isolate_, exception).ToHandle(&result)) break;
       answer = Handle<String>::cast(result);
     }
 
     // Return the result.
     MessageImpl message = MessageImpl::NewResponse(
         event, running, exec_state, event_data, answer, command.client_data());
     InvokeMessageHandler(message);
     command.Dispose();
 
     // Return from debug event processing if either the VM is put into the
@@ skipping 451 matching lines @@
 }
 
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 }  // namespace internal
 }  // namespace v8