iwyu: Include stringprintf.h where appropriate, part 2.

chrome/renderer/spellchecker/spellcheck_worditerator.cc

Index: chrome/renderer/spellchecker/spellcheck_worditerator.cc
diff --git a/chrome/renderer/spellchecker/spellcheck_worditerator.cc b/chrome/renderer/spellchecker/spellcheck_worditerator.cc
index 3f5d69c66fe024bda612a4a8209b03a57fbcae8f..1e9980b20d4a0377af151d7cb19e1b65b150e768 100644
--- a/chrome/renderer/spellchecker/spellcheck_worditerator.cc
+++ b/chrome/renderer/spellchecker/spellcheck_worditerator.cc
@@ -9,16 +9,15 @@
 #include <map>
 #include <string>
 
-#include "unicode/normlzr.h"
-#include "unicode/schriter.h"
-#include "unicode/uscript.h"
-#include "unicode/ulocdata.h"
-
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
+#include "unicode/normlzr.h"
+#include "unicode/schriter.h"
+#include "unicode/uscript.h"
+#include "unicode/ulocdata.h"
 
 // SpellcheckCharAttribute implementation:
 
@@ -169,10 +168,18 @@ void SpellcheckCharAttribute::CreateRuleSets(const std::string& language) {
       "$ALetterEx ($MidLetterEx | $MidNumLetEx) $ALetterEx {200};";
   const char kDisallowContraction[] = "";
 
-  ruleset_allow_contraction_ = ASCIIToUTF16(StringPrintf(kRuleTemplate,
-      aletter, midletter_extra, aletter_plus, kAllowContraction));
-  ruleset_disallow_contraction_ = ASCIIToUTF16(StringPrintf(kRuleTemplate,
-      aletter, midletter_extra, aletter_plus, kDisallowContraction));
+  ruleset_allow_contraction_ = ASCIIToUTF16(
+      base::StringPrintf(kRuleTemplate,
+                         aletter,
+                         midletter_extra,
+                         aletter_plus,
+                         kAllowContraction));
+  ruleset_disallow_contraction_ = ASCIIToUTF16(
+      base::StringPrintf(kRuleTemplate,
+                         aletter,
+                         midletter_extra,
+                         aletter_plus,
+                         kDisallowContraction));
 }
 
 bool SpellcheckCharAttribute::OutputChar(UChar c, string16* output) const {