base: Get rid of 'using' declaration of StringAppendF.

net/proxy/proxy_bypass_rules.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/proxy/proxy_bypass_rules.h"
 
 #include "base/string_number_conversions.h"
 #include "base/string_tokenizer.h"
 #include "base/string_util.h"
 #include "net/base/net_util.h"
@@ skipping 20 matching lines @@
       return false;  // Didn't match scheme expectation.
 
     // Note it is necessary to lower-case the host, since GURL uses capital
     // letters for percent-escaped characters.
     return MatchPattern(StringToLowerASCII(url.host()), hostname_pattern_);
   }
 
   virtual std::string ToString() const {
     std::string str;
     if (!optional_scheme_.empty())
-      StringAppendF(&str, "%s://", optional_scheme_.c_str());
+      base::StringAppendF(&str, "%s://", optional_scheme_.c_str());
     str += hostname_pattern_;
     if (optional_port_ != -1)
-      StringAppendF(&str, ":%d", optional_port_);
+      base::StringAppendF(&str, ":%d", optional_port_);
     return str;
   }
 
  private:
   const std::string optional_scheme_;
   const std::string hostname_pattern_;
   const int optional_port_;
 };
 
 class BypassLocalRule : public ProxyBypassRules::Rule {
@@ skipping 229 matching lines @@
   return AddRuleForHostname(scheme, raw, port);
 }
 
 bool ProxyBypassRules::AddRuleFromStringInternalWithLogging(
     const std::string& raw,
     bool use_hostname_suffix_matching) {
   return AddRuleFromStringInternal(raw, use_hostname_suffix_matching);
 }
 
 }  // namespace net