Make sure that canonical NaN is also platform NaN.

src/v8globals.h

Index: src/v8globals.h
diff --git a/src/v8globals.h b/src/v8globals.h
index 98874b50c05d01c7c687aeeac0f6ac14fec73f39..aff27579f8d78b6cd8337f9b8fba578237993c42 100644
--- a/src/v8globals.h
+++ b/src/v8globals.h
@@ -509,15 +509,10 @@ enum CallKind {
 
 static const uint32_t kHoleNanUpper32 = 0x7FFFFFFF;
 static const uint32_t kHoleNanLower32 = 0xFFFFFFFF;
-static const uint32_t kCanonicalNonHoleNanUpper32 = 0x7FF10000;
-static const uint32_t kCanonicalNonHoleNanLower32 = 0xFFFFFFFF;
 static const uint32_t kNaNOrInfinityLowerBoundUpper32 = 0x7FF00000;
 
 const uint64_t kHoleNanInt64 =
     (static_cast<uint64_t>(kHoleNanUpper32) << 32) | kHoleNanLower32;
-const uint64_t kCanonicalNonHoleNanInt64 =
-    (static_cast<uint64_t>(kCanonicalNonHoleNanUpper32) << 32) |
-        kCanonicalNonHoleNanLower32;
 const uint64_t kLastNonNaNInt64 =
     (static_cast<uint64_t>(kNaNOrInfinityLowerBoundUpper32) << 32);