Remove deprecated v8::base::OS::nan_value().

test/cctest/compiler/test-branch-combine.cc

 // Copyright 2014 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/v8.h"
 
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/codegen-tester.h"
 #include "test/cctest/compiler/value-helper.h"
 
@@ skipping 397 matching lines @@
   for (int i = 0; i < static_cast<int>(arraysize(int32cmp_opcodes)); i++) {
     CmpBranchGen gen(int32cmp_opcodes[i], true, true, 595 + i, -4011 - i);
     Int32BinopInputShapeTester tester(&gen);
     tester.TestAllInputShapes();
   }
 }
 
 
 TEST(BranchCombineFloat64Compares) {
   double inf = V8_INFINITY;
-  double nan = v8::base::OS::nan_value();
+  double nan = std::numeric_limits<double>::quiet_NaN();
   double inputs[] = {0.0, 1.0, -1.0, -inf, inf, nan};
 
   int32_t eq_constant = -1733;
   int32_t ne_constant = 915118;
 
   double input_a = 0.0;
   double input_b = 0.0;
 
   CompareWrapper cmps[] = {CompareWrapper(IrOpcode::kFloat64Equal),
                            CompareWrapper(IrOpcode::kFloat64LessThan),
@@ skipping 24 matching lines @@
                                                              : eq_constant)
                      : (cmp.Float64Compare(input_a, input_b) ? eq_constant
                                                              : ne_constant);
           CHECK_EQ(expected, m.Call());
         }
       }
     }
   }
 }
 #endif  // V8_TURBOFAN_TARGET