Switch the offset conversion routines from...

base/strings/utf_offset_string_conversions.h

Index: base/strings/utf_offset_string_conversions.h
===================================================================
--- base/strings/utf_offset_string_conversions.h	(revision 221015)
+++ base/strings/utf_offset_string_conversions.h	(working copy)
@@ -44,14 +44,14 @@
     std::vector<size_t>* offsets_for_adjustment);
 
 // Limiting function callable by std::for_each which will replace any value
-// which is equal to or greater than |limit| with npos.
+// which is greater than |limit| with npos.
 template <typename T>
 struct LimitOffset {
   explicit LimitOffset(size_t limit)
     : limit_(limit) {}
 
   void operator()(size_t& offset) {
-    if (offset >= limit_)
+    if (offset > limit_)
       offset = T::npos;
   }