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

chrome/browser/ui/webui/options/language_options_handler_common.cc

Index: chrome/browser/ui/webui/options/language_options_handler_common.cc
diff --git a/chrome/browser/ui/webui/options/language_options_handler_common.cc b/chrome/browser/ui/webui/options/language_options_handler_common.cc
index 77fa00c86a96f10953a47188be77961db1769966..d020e584cf28dac0725911f52c50ee7eb1c2aba5 100644
--- a/chrome/browser/ui/webui/options/language_options_handler_common.cc
+++ b/chrome/browser/ui/webui/options/language_options_handler_common.cc
@@ -11,6 +11,7 @@
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
+#include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ -146,7 +147,7 @@ void LanguageOptionsHandlerCommon::UiLanguageChangeCallback(
     const ListValue* args) {
   const std::string language_code = UTF16ToASCII(ExtractStringValue(args));
   CHECK(!language_code.empty());
-  const std::string action = StringPrintf(
+  const std::string action = base::StringPrintf(
       "LanguageOptions_UiLanguageChange_%s", language_code.c_str());
   UserMetrics::RecordComputedAction(action);
   SetApplicationLocale(language_code);
@@ -157,7 +158,7 @@ void LanguageOptionsHandlerCommon::SpellCheckLanguageChangeCallback(
     const ListValue* args) {
   const std::string language_code = UTF16ToASCII(ExtractStringValue(args));
   CHECK(!language_code.empty());
-  const std::string action = StringPrintf(
+  const std::string action = base::StringPrintf(
       "LanguageOptions_SpellCheckLanguageChange_%s", language_code.c_str());
   UserMetrics::RecordComputedAction(action);
 }