Use a direct include of strings headers in hunspell.

hunspell/google.patch

 Index: src/hunspell/affixmgr.cxx
 ===================================================================
 RCS file: /cvsroot/hunspell/hunspell/src/hunspell/affixmgr.cxx,v
 retrieving revision 1.41
 diff -u -r1.41 affixmgr.cxx
 --- src/hunspell/affixmgr.cxx   16 Dec 2011 09:15:34 -0000      1.41
 +++ src/hunspell/affixmgr.cxx   27 Feb 2013 01:10:35 -0000
 @@ -14,8 +14,14 @@
  
  #include "csutil.hxx"
@@ skipping 730 matching lines @@
 +++ src/hunspell/hashmgr.hxx    27 Feb 2013 01:10:35 -0000
 @@ -8,10 +8,25 @@
  #include "htypes.hxx"
  #include "filemgr.hxx"
  
 +#ifdef HUNSPELL_CHROME_CLIENT
 +#include <string>
 +#include <map>
 +
 +#include "base/stl_util.h"
-+#include "base/string_piece.h"
++#include "base/strings/string_piece.h"
 +#include "third_party/hunspell/google/bdict_reader.h"
 +#endif
 +
  enum flag { FLAG_CHAR, FLAG_LONG, FLAG_NUM, FLAG_UNI };
  
  class LIBHUNSPELL_DLL_EXPORTED HashMgr
  {
 +#ifdef HUNSPELL_CHROME_CLIENT
 +  // Not owned by this class, owned by the Hunspell object.
 +  hunspell::BDictReader* bdict_reader;
@@ skipping 564 matching lines @@
    char * suggest_morph_for_spelling_error(const char * word);
  
  private:
 +#ifdef HUNSPELL_CHROME_CLIENT
 +   // Not owned by us, owned by the Hunspell object.
 +   hunspell::BDictReader* bdict_reader;
 +#endif
     int testsug(char** wlst, const char * candidate, int wl, int ns, int cpdsuggest,
       int * timer, clock_t * timelimit);
     int checkword(const char *, int, int, int *, clock_t *);