[Cleanup] Remove StringPrintf from global namespace

google_apis/gaia/oauth2_mint_token_fetcher.cc

 // Copyright (c) 2012 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 "google_apis/gaia/oauth2_mint_token_fetcher.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/json/json_reader.h"
@@ skipping 145 matching lines @@
 }
 
 // static
 GURL OAuth2MintTokenFetcher::MakeMintTokenUrl() {
   return GURL(GaiaUrls::GetInstance()->oauth2_issue_token_url());
 }
 
 // static
 std::string OAuth2MintTokenFetcher::MakeMintTokenHeader(
     const std::string& access_token) {
-  return StringPrintf(kAuthorizationHeaderFormat, access_token.c_str());
+  return base::StringPrintf(kAuthorizationHeaderFormat, access_token.c_str());
 }
 
 // static
 std::string OAuth2MintTokenFetcher::MakeMintTokenBody(
     const std::string& client_id,
     const std::vector<std::string>& scopes,
     const std::string& origin) {
-  return StringPrintf(
+  return base::StringPrintf(
       kOAuth2IssueTokenBodyFormat,
       net::EscapeUrlEncodedData(JoinString(scopes, ','), true).c_str(),
       net::EscapeUrlEncodedData(client_id, true).c_str(),
       net::EscapeUrlEncodedData(origin, true).c_str());
 }
 
 // static
 bool OAuth2MintTokenFetcher::ParseMintTokenResponse(
     const net::URLFetcher* source,
     std::string* access_token) {
   CHECK(source);
   CHECK(access_token);
   std::string data;
   source->GetResponseAsString(&data);
   scoped_ptr<base::Value> value(base::JSONReader::Read(data));
   if (!value.get() || value->GetType() != base::Value::TYPE_DICTIONARY)
     return false;
 
   DictionaryValue* dict = static_cast<DictionaryValue*>(value.get());
   return dict->GetString(kAccessTokenKey, access_token);
 }