Move StartsWith[ASCII] to base namespace.

content/public/test/browser_test_utils.cc

Index: content/public/test/browser_test_utils.cc
diff --git a/content/public/test/browser_test_utils.cc b/content/public/test/browser_test_utils.cc
index c7223936ce9481609d2a46a75f5d359812cbbbd1..821d975bec021a6bc2e823bb2cef5dd0cc14e851 100644
--- a/content/public/test/browser_test_utils.cc
+++ b/content/public/test/browser_test_utils.cc
@@ -231,7 +231,7 @@ scoped_ptr<net::test_server::HttpResponse> CrossSiteRedirectResponseHandler(
     const GURL& server_base_url,
     const net::test_server::HttpRequest& request) {
   std::string prefix("/cross-site/");
-  if (!StartsWithASCII(request.relative_url, prefix, true))
+  if (!base::StartsWithASCII(request.relative_url, prefix, true))
     return scoped_ptr<net::test_server::HttpResponse>();
 
   std::string params = request.relative_url.substr(prefix.length());