Reset word iterators when changing the spellchecker language.

chrome/renderer/spellchecker/spellcheck_worditerator.h

Index: chrome/renderer/spellchecker/spellcheck_worditerator.h
===================================================================
--- chrome/renderer/spellchecker/spellcheck_worditerator.h	(revision 153594)
+++ chrome/renderer/spellchecker/spellcheck_worditerator.h	(working copy)
@@ -139,10 +139,10 @@
                    int* word_start,
                    int* word_length);
 
- private:
   // Releases all the resources attached to this object.
-  void Close();
+  void Reset();
 
+ private:
   // Normalizes a non-terminated string returned from an ICU word-break
   // iterator. A word returned from an ICU break iterator may include characters
   // not supported by our spellchecker, e.g. ligatures, combining/ characters,