explicit operator bool for CFX_RetainPtr and CFX_CountRef

core/fxcrt/cfx_retain_ptr_unittest.cpp

 // Copyright 2016 PDFium 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 "core/fxcrt/include/cfx_retain_ptr.h"
 
 #include <utility>
 
 #include "testing/fx_string_testhelpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 190 matching lines @@
   }
   EXPECT_TRUE(null_ptr1 != obj1_ptr1);
   EXPECT_TRUE(null_ptr1 != obj2_ptr1);
   EXPECT_TRUE(obj1_ptr1 != obj2_ptr1);
 }
 
 TEST(fxcrt, RetainPtrBool) {
   PseudoRetainable obj1;
   CFX_RetainPtr<PseudoRetainable> null_ptr;
   CFX_RetainPtr<PseudoRetainable> obj1_ptr(&obj1);
-  bool null_bool = null_ptr;
-  bool obj1_bool = obj1_ptr;
+  bool null_bool = !!null_ptr;
+  bool obj1_bool = !!obj1_ptr;
   EXPECT_FALSE(null_bool);
   EXPECT_TRUE(obj1_bool);
 }