Rename IsAsciiRepresentation

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index a6192d8d6ea24b42b04c6405eb7b490e66b8f014..de4752b88d989582fcc48974c4700cc613007a41 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -915,7 +915,7 @@ int Utf8LengthHelper(String* input,
   int total = 0;
   bool dummy;
   while (true) {
-    if (input->IsAsciiRepresentation()) {
+    if (input->IsOneByteRepresentation()) {
       *starts_with_surrogate = false;
       return total + to - from;
     }
@@ -948,14 +948,14 @@ int Utf8LengthHelper(String* input,
         } else {
           if (first_length > from) {
             // Left hand side is shorter.
-            if (first->IsAsciiRepresentation()) {
+            if (first->IsOneByteRepresentation()) {
               total += first_length - from;
               *starts_with_surrogate = false;
               starts_with_surrogate = &dummy;
               input = second;
               from = 0;
               to -= first_length;
-            } else if (second->IsAsciiRepresentation()) {
+            } else if (second->IsOneByteRepresentation()) {
               followed_by_surrogate = false;
               total += to - first_length;
               input = first;