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

chrome/service/net/service_url_request_context.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 "chrome/service/net/service_url_request_context.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <sys/utsname.h>
 #endif
 
@@ skipping 37 matching lines @@
   std::string cputype;
   // special case for biarch systems
   if (strcmp(unixinfo.machine, "x86_64") == 0 &&
       sizeof(void*) == sizeof(int32)) {  // NOLINT
     cputype.assign("i686 (x86_64)");
   } else {
     cputype.assign(unixinfo.machine);
   }
 #endif
 
-  StringAppendF(
+  base::StringAppendF(
       &os_cpu,
 #if defined(OS_WIN)
       "Windows NT %d.%d",
       os_major_version,
       os_minor_version
 #elif defined(OS_MACOSX)
       "Intel Mac OS X %d_%d_%d",
       os_major_version,
       os_minor_version,
       os_bugfix_version
@@ skipping 15 matching lines @@
 
 std::string MakeUserAgentForServiceProcess() {
   std::string user_agent;
   chrome::VersionInfo version_info;
   if (!version_info.is_valid()) {
     DLOG(ERROR) << "Unable to create chrome::VersionInfo object";
   }
   std::string extra_version_info;
   if (!version_info.IsOfficialBuild())
     extra_version_info = "-devel";
-  StringAppendF(&user_agent,
-                "Chrome Service %s(%s)%s %s ",
-                version_info.Version().c_str(),
-                version_info.LastChange().c_str(),
-                extra_version_info.c_str(),
-                BuildOSCpuInfo().c_str());
+  base::StringAppendF(&user_agent,
+                      "Chrome Service %s(%s)%s %s ",
+                      version_info.Version().c_str(),
+                      version_info.LastChange().c_str(),
+                      extra_version_info.c_str(),
+                      BuildOSCpuInfo().c_str());
   return user_agent;
 }
 
 }  // namespace
 
 ServiceURLRequestContext::ServiceURLRequestContext(
     const std::string& user_agent) : user_agent_(user_agent) {
   host_resolver_ =
       net::CreateSystemHostResolver(net::HostResolver::kDefaultParallelism,
                                     NULL, NULL);
@@ skipping 48 matching lines @@
     url_request_context_ = new ServiceURLRequestContext(user_agent_);
   return url_request_context_;
 }
 
 scoped_refptr<base::MessageLoopProxy>
 ServiceURLRequestContextGetter::GetIOMessageLoopProxy() const {
   return io_message_loop_proxy_;
 }
 
 ServiceURLRequestContextGetter::~ServiceURLRequestContextGetter() {}