[Cleanup] Remove StringPrintf from global namespace

chrome/browser/chromeos/boot_times_loader.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 "chrome/browser/chromeos/boot_times_loader.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 341 matching lines @@
           name,
           base::TimeDelta::FromMilliseconds(kMinTimeMillis),
           base::TimeDelta::FromMilliseconds(kMaxTimeMillis),
           kNumBuckets,
           base::HistogramBase::kUmaTargetedHistogramFlag);
       prev_hist->AddTime(since_prev);
     } else {
       name = tm.name();
     }
     output +=
-        StringPrintf(
+        base::StringPrintf(
             "\n%.2f +%.4f %s",
             since_first.InSecondsF(),
             since_prev.InSecondsF(),
             name.data());
     prev = tm.time();
   }
   output += '\n';
 
   file_util::WriteFile(
       log_path.Append(base_name), output.data(), output.size());
@@ skipping 164 matching lines @@
           GetRenderWidgetHost(&web_contents->GetController());
       render_widget_hosts_loading_.erase(render_widget_host);
       break;
     }
     default:
       break;
   }
 }
 
 }  // namespace chromeos