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

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
diff --git a/src/mips/assembler-mips.cc b/src/mips/assembler-mips.cc
index d6a4f793f4d88f0f370f34c8e40792a68c84a80d..8e936e1947544aa1fa807885eefc3fa2b9a42ca9 100644
--- a/src/mips/assembler-mips.cc
+++ b/src/mips/assembler-mips.cc
@@ -2575,7 +2575,7 @@ Address Assembler::target_address_at(Address pc) {
 // snapshot generated on ia32, the resulting MIPS sNaN must be quieted.
 // OS::nan_value() returns a qNaN.
 void Assembler::QuietNaN(HeapObject* object) {
-  HeapNumber::cast(object)->set_value(base::OS::nan_value());
+  HeapNumber::cast(object)->set_value(std::numeric_limits<double>::quiet_NaN());
 }