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

src/base/platform/platform-posix.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.
 
 // Platform-specific code for POSIX goes here. This is not a platform on its
 // own, but contains the parts which are the same across the POSIX platforms
 // Linux, MacOS, FreeBSD, OpenBSD, NetBSD and QNX.
 
 #include <errno.h>
 #include <limits.h>
@@ skipping 231 matching lines @@
   asm("int $3");
 #endif  // V8_OS_NACL
 #elif V8_HOST_ARCH_X64
   asm("int $3");
 #else
 #error Unsupported host architecture.
 #endif
 }
 
 
-// ----------------------------------------------------------------------------
-// Math functions
-
-double OS::nan_value() {
-  // NAN from math.h is defined in C99 and not in POSIX.
-  return NAN;
-}
-
-
 int OS::GetCurrentProcessId() {
   return static_cast<int>(getpid());
 }
 
 
 int OS::GetCurrentThreadId() {
 #if V8_OS_MACOSX || (V8_OS_ANDROID && defined(__APPLE__))
   return static_cast<int>(pthread_mach_thread_np(pthread_self()));
 #elif V8_OS_LINUX
   return static_cast<int>(syscall(__NR_gettid));
@@ skipping 41 matching lines @@
   DCHECK(cache == NULL);
 }
 
 
 void OS::ClearTimezoneCache(TimezoneCache* cache) {
   DCHECK(cache == NULL);
 }
 
 
 double OS::DaylightSavingsOffset(double time, TimezoneCache*) {
-  if (std::isnan(time)) return nan_value();
+  if (std::isnan(time)) return std::numeric_limits<double>::quiet_NaN();
   time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
   struct tm* t = localtime(&tv);
-  if (NULL == t) return nan_value();
+  if (NULL == t) return std::numeric_limits<double>::quiet_NaN();
   return t->tm_isdst > 0 ? 3600 * msPerSecond : 0;
 }
 
 
 int OS::GetLastError() {
   return errno;
 }
 
 
 // ----------------------------------------------------------------------------
@@ skipping 344 matching lines @@
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = LocalKeyToPthreadKey(key);
   int result = pthread_setspecific(pthread_key, value);
   DCHECK_EQ(0, result);
   USE(result);
 }
 
 
 } }  // namespace v8::base