Fix bug in Utf8::CodePointCount which was causing some strings with latin1

vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 10045 matching lines @@
   intptr_t array_len = strlen(str);
   const uint8_t* utf8_array = reinterpret_cast<const uint8_t*>(str);
   return String::New(utf8_array, array_len, space);
 }
 
 
 RawString* String::New(const uint8_t* utf8_array,
                        intptr_t array_len,
                        Heap::Space space) {
   Utf8::Type type;
-  intptr_t len = Utf8::CodePointCount(utf8_array, array_len, &type);
+  intptr_t len = Utf8::CodeUnitCount(utf8_array, array_len, &type);
   if (type == Utf8::kLatin1) {
     const String& strobj = String::Handle(OneByteString::New(len, space));
     if (len > 0) {
       NoGCScope no_gc;
       Utf8::DecodeToLatin1(utf8_array, array_len,
                            OneByteString::CharAddr(strobj, 0), len);
     }
     return strobj.raw();
   }
   ASSERT((type == Utf8::kBMP) || (type == Utf8::kSupplementary));
@@ skipping 2006 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart