Heap::AllocateStringFromOneByte() and major part of its callers handlified.

src/ast.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1161 matching lines @@
   char arr[100];
   Vector<char> buffer(arr, ARRAY_SIZE(arr));
   const char* str;
   if (value_->IsSmi()) {
     // Optimization only, the heap number case would subsume this.
     OS::SNPrintF(buffer, "%d", Smi::cast(*value_)->value());
     str = arr;
   } else {
     str = DoubleToCString(value_->Number(), buffer);
   }
-  return isolate_->factory()->NewStringFromAscii(CStrVector(str));
+  return isolate_->factory()->NewStringFromAsciiChecked(str);
 }
 
 
 } }  // namespace v8::internal