Rename ascii to one-byte where applicable.

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index 1b495265265dd412467136a6b3b0736a28abe5c1..30c474d5fff58fd8130f5bc00d58c89f78f1438c 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -388,7 +388,7 @@ Handle<Object> Context::ErrorMessageForCodeGenerationFromStrings() {
   Isolate* isolate = GetIsolate();
   Handle<Object> result(error_message_for_code_gen_from_strings(), isolate);
   if (!result->IsUndefined()) return result;
-  return isolate->factory()->NewStringFromStaticAscii(
+  return isolate->factory()->NewStringFromStaticChars(
       "Code generation from strings disallowed for this context");
 }