chrome: Use base's ContainsValue helper function instead of std::find

chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
index 3ffbad1aceb3bdc3e2eee6ebd5c05276677753f2..7e1cdb3a1564b89eb14d3fd1b4586fc93392c856 100644
--- a/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
@@ -9,6 +9,7 @@
 #include "base/guid.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
+#include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ -160,8 +161,7 @@ void PushFrontIMIfNotExists(const std::string& input_method,
   if (input_method.empty())
     return;
 
-  if (std::find(input_methods->begin(), input_methods->end(), input_method) ==
-      input_methods->end())
+  if (!ContainsValue(*input_methods, input_method))
     input_methods->insert(input_methods->begin(), input_method);
 }