HasOnlyAsciiChars can return incorrect results. Fixup usages and rename.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index f21481ab0bbbd37f4023e2fdfcaefed23f73925e..5aeeec6567ece92a4613ce1a9366b3b35085ec67 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -495,11 +495,11 @@ static const char* TypeToString(InstanceType type) {
       return "CONS_STRING";
     case EXTERNAL_STRING_TYPE:
     case EXTERNAL_ASCII_STRING_TYPE:
-    case EXTERNAL_STRING_WITH_ASCII_DATA_TYPE:
+    case EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE:
       return "EXTERNAL_STRING";
     case SHORT_EXTERNAL_STRING_TYPE:
     case SHORT_EXTERNAL_ASCII_STRING_TYPE:
-    case SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE:
+    case SHORT_EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE:
       return "SHORT_EXTERNAL_STRING";
     case INTERNALIZED_STRING_TYPE: return "INTERNALIZED_STRING";
     case ASCII_INTERNALIZED_STRING_TYPE: return "ASCII_INTERNALIZED_STRING";
@@ -508,11 +508,11 @@ static const char* TypeToString(InstanceType type) {
       return "CONS_ASCII_INTERNALIZED_STRING";
     case EXTERNAL_INTERNALIZED_STRING_TYPE:
     case EXTERNAL_ASCII_INTERNALIZED_STRING_TYPE:
-    case EXTERNAL_INTERNALIZED_STRING_WITH_ASCII_DATA_TYPE:
+    case EXTERNAL_INTERNALIZED_STRING_WITH_ONE_BYTE_DATA_TYPE:
       return "EXTERNAL_INTERNALIZED_STRING";
     case SHORT_EXTERNAL_INTERNALIZED_STRING_TYPE:
     case SHORT_EXTERNAL_ASCII_INTERNALIZED_STRING_TYPE:
-    case SHORT_EXTERNAL_INTERNALIZED_STRING_WITH_ASCII_DATA_TYPE:
+    case SHORT_EXTERNAL_INTERNALIZED_STRING_WITH_ONE_BYTE_DATA_TYPE:
       return "SHORT_EXTERNAL_INTERNALIZED_STRING";
     case FIXED_ARRAY_TYPE: return "FIXED_ARRAY";
     case BYTE_ARRAY_TYPE: return "BYTE_ARRAY";