Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/sync/test/integration/passwords_helper.cc

Index: chrome/browser/sync/test/integration/passwords_helper.cc
diff --git a/chrome/browser/sync/test/integration/passwords_helper.cc b/chrome/browser/sync/test/integration/passwords_helper.cc
index ccab9ef756911c9d177528a60292c5f133783063..ba784701799234dff0943e238329e001ca9a95aa 100644
--- a/chrome/browser/sync/test/integration/passwords_helper.cc
+++ b/chrome/browser/sync/test/integration/passwords_helper.cc
@@ -216,8 +216,10 @@ PasswordForm CreateTestPasswordForm(int index) {
   PasswordForm form;
   form.signon_realm = kFakeSignonRealm;
   form.origin = GURL(base::StringPrintf(kIndexedFakeOrigin, index));
-  form.username_value = ASCIIToUTF16(base::StringPrintf("username%d", index));
-  form.password_value = ASCIIToUTF16(base::StringPrintf("password%d", index));
+  form.username_value =
+      base::ASCIIToUTF16(base::StringPrintf("username%d", index));
+  form.password_value =
+      base::ASCIIToUTF16(base::StringPrintf("password%d", index));
   form.date_created = base::Time::Now();
   return form;
 }