Move more string_util functions to base namespace.

chrome/browser/internal_auth.cc

Index: chrome/browser/internal_auth.cc
diff --git a/chrome/browser/internal_auth.cc b/chrome/browser/internal_auth.cc
index 4286011fb38810ae4f6ec16cee6d3e122f0ae4dc..c3f44c7cdad5abfa5e664a3c9182023574b79d33 100644
--- a/chrome/browser/internal_auth.cc
+++ b/chrome/browser/internal_auth.cc
@@ -112,7 +112,7 @@ bool IsVarSane(const std::string& var) {
       var.size() <= kStringLengthLimit &&
       base::IsStringASCII(var) &&
       var.find_first_not_of(kAllowedChars) == std::string::npos &&
-      !IsAsciiDigit(var[0]);
+      !base::IsAsciiDigit(var[0]);
 }
 
 bool IsValueSane(const std::string& value) {
@@ -448,7 +448,7 @@ bool InternalAuthVerification::VerifyPassport(
 void InternalAuthVerification::ChangeKey(const std::string& key) {
   base::AutoLock alk(g_verification_service_lock.Get());
   g_verification_service.Get().ChangeKey(key);
-};
+}
 
 // static
 int InternalAuthVerification::get_verification_window_ticks() {