Move UTF16ToASCII, remove WideToASCII.

chrome/test/perf/startup_test.cc

Index: chrome/test/perf/startup_test.cc
diff --git a/chrome/test/perf/startup_test.cc b/chrome/test/perf/startup_test.cc
index 2f93bb0e6b6d3a66fbd5585fc0bbda46b3fa2570..8fe062a07a7547fac2f1036555e84b68e5329ded 100644
--- a/chrome/test/perf/startup_test.cc
+++ b/chrome/test/perf/startup_test.cc
@@ -135,10 +135,10 @@ class StartupTest : public UIPerfTest {
     // Rewrite prefs file.
     std::vector<base::string16> subst;
     subst.push_back(base::WideToUTF16(user_data_dir_w));
-    const std::string prefs_string =
-        UTF16ToASCII(ReplaceStringPlaceholders(format_string, subst, NULL));
+    const std::string prefs_string = base::UTF16ToASCII(
+        ReplaceStringPlaceholders(format_string, subst, NULL));
     EXPECT_TRUE(base::WriteFile(pref_path, prefs_string.c_str(),
-                                     prefs_string.size()));
+                                prefs_string.size()));
     file_util::EvictFileFromSystemCache(pref_path);
   }