Rename kAsciiStringTag to kOneByteStringTag

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 77506741a3a184e62e75c8db359c68d21711ff66..962c2e8b45e0067e6b81c9601ca2d64b5c1fa5a8 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -2228,7 +2228,7 @@ void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(
       kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask;
 
   andl(scratch, Immediate(kFlatAsciiStringMask));
-  cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag));
+  cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kOneByteStringTag));
   j(not_equal, failure, near_jump);
 }
 
@@ -4503,7 +4503,7 @@ void MacroAssembler::EnsureNotWhite(
 
   bind(&not_external);
   // Sequential string, either ASCII or UC16.
-  ASSERT(kAsciiStringTag == 0x04);
+  ASSERT(kOneByteStringTag == 0x04);
   and_(length, Immediate(kStringEncodingMask));
   xor_(length, Immediate(kStringEncodingMask));
   addq(length, Immediate(0x04));