net: Append base:: in the StringPrintf calls.

net/http/http_auth_handler.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/http/http_auth_handler.h"
 
 #include "base/histogram.h"
 #include "base/logging.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "net/base/net_errors.h"
 
 namespace net {
 
 HttpAuthHandler::HttpAuthHandler()
     : score_(-1),
       target_(HttpAuth::AUTH_NONE),
       properties_(-1),
       original_callback_(NULL),
       ALLOW_THIS_IN_INITIALIZER_LIST(
           wrapper_callback_(
               this, &HttpAuthHandler::OnGenerateAuthTokenComplete)) {
 }
 
 HttpAuthHandler::~HttpAuthHandler() {
 }
 
 //static
 std::string HttpAuthHandler::GenerateHistogramNameFromScheme(
     const std::string& scheme) {
-  return StringPrintf("Net.AuthGenerateToken_%s", scheme.c_str());
+  return base::StringPrintf("Net.AuthGenerateToken_%s", scheme.c_str());
 }
 
 bool HttpAuthHandler::InitFromChallenge(
     HttpAuth::ChallengeTokenizer* challenge,
     HttpAuth::Target target,
     const GURL& origin,
     const BoundNetLog& net_log) {
   origin_ = origin;
   target_ = target;
   score_ = -1;
@@ skipping 68 matching lines @@
   // TOOD(cbentzel): Should this be done in OK case only?
   DCHECK(histogram_.get());
   base::TimeDelta generate_auth_token_duration =
       base::TimeTicks::Now() - generate_auth_token_start_;
   histogram_->AddTime(generate_auth_token_duration);
   net_log_.EndEvent(EventTypeFromAuthTarget(target_), NULL);
   original_callback_ = NULL;
 }
 
 }  // namespace net