Move StartsWith[ASCII] to base namespace.

google_apis/gaia/gaia_auth_fetcher.cc

Index: google_apis/gaia/gaia_auth_fetcher.cc
diff --git a/google_apis/gaia/gaia_auth_fetcher.cc b/google_apis/gaia/gaia_auth_fetcher.cc
index e1ef712a25442eaec03d7038fa18731d89922fa7..0ae69127ecf98d7eabdee552a46f2f2a96458e6e 100644
--- a/google_apis/gaia/gaia_auth_fetcher.cc
+++ b/google_apis/gaia/gaia_auth_fetcher.cc
@@ -539,8 +539,8 @@ bool GaiaAuthFetcher::ParseClientLoginToOAuth2Cookie(const std::string& cookie,
   std::vector<std::string>::const_iterator iter;
   for (iter = parts.begin(); iter != parts.end(); ++iter) {
     const std::string& part = *iter;
-    if (StartsWithASCII(
-        part, kClientLoginToOAuth2CookiePartCodePrefix, false)) {
+    if (base::StartsWithASCII(part, kClientLoginToOAuth2CookiePartCodePrefix,
+                              false)) {
       auth_code->assign(part.substr(
           kClientLoginToOAuth2CookiePartCodePrefixLength));
       return true;