[Cleanup] Remove StringPrintf from global namespace

chrome_frame/metrics_service.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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is created at ChromeFrame startup in
@@ skipping 162 matching lines @@
                     << hr;
       }
     }
     return hr;
   }
 
   STDMETHOD(BeginningTransaction)(LPCWSTR url, LPCWSTR headers, DWORD reserved,
                                   LPWSTR* additional_headers) {
     std::string new_headers;
     new_headers =
-        StringPrintf("Content-Length: %s\r\n"
-                     "Content-Type: %s\r\n"
-                     "%s\r\n",
-                     base::Int64ToString(upload_data_size_).c_str(),
-                     mime_type_.c_str(),
-                     http_utils::GetDefaultUserAgentHeaderWithCFTag().c_str());
+        base::StringPrintf(
+            "Content-Length: %s\r\n"
+            "Content-Type: %s\r\n"
+            "%s\r\n",
+            base::Int64ToString(upload_data_size_).c_str(),
+            mime_type_.c_str(),
+            http_utils::GetDefaultUserAgentHeaderWithCFTag().c_str());
 
     *additional_headers = reinterpret_cast<wchar_t*>(
         CoTaskMemAlloc((new_headers.size() + 1) * sizeof(wchar_t)));
 
     lstrcpynW(*additional_headers, ASCIIToWide(new_headers).c_str(),
               new_headers.size());
 
     return BSCBImpl::BeginningTransaction(url, headers, reserved,
                                           additional_headers);
   }
@@ skipping 263 matching lines @@
     version += "-F";
     if (!version_info.IsOfficialBuild())
       version.append("-devel");
     return version;
   } else {
     NOTREACHED() << "Unable to retrieve version string.";
   }
 
   return std::string();
 }