Add an explicit bool conversion to scoped_refptr<T>.

chrome/installer/util/wmi.cc

 // Copyright (c) 2010 The Chromium 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 "chrome/installer/util/wmi.h"
 
 #include <windows.h>
 
 #include "base/basictypes.h"
 #include "base/win/scoped_bstr.h"
@@ skipping 51 matching lines @@
   hr = wmi_services->GetObject(b_class_name, 0, NULL,
                                class_object.Receive(), NULL);
   if (FAILED(hr))
     return false;
 
   base::win::ScopedComPtr<IWbemClassObject> params_def;
   hr = class_object->GetMethod(b_method_name, 0, params_def.Receive(), NULL);
   if (FAILED(hr))
     return false;
 
-  if (NULL == params_def) {
+  if (!params_def) {
     // You hit this special case if the WMI class is not a CIM class. MSDN
     // sometimes tells you this. Welcome to WMI hell.
     return false;
   }
 
   hr = params_def->SpawnInstance(0, class_instance);
   return(SUCCEEDED(hr));
 }
 
 bool SetParameter(IWbemClassObject* class_method,
@@ skipping 85 matching lines @@
     if (model.type() == VT_BSTR)
       model_string += L" ";
   }
   if (model.type() == VT_BSTR)
     model_string += V_BSTR(&model);
 
   return model_string;
 }
 
 }  // namespace installer