[Cleanup] Remove StringPrintf from global namespace

cc/base/worker_pool.cc

 // Copyright 2013 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 "cc/base/worker_pool.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/condition_variable.h"
@@ skipping 165 matching lines @@
       next_thread_index_(0),
       running_task_count_(0),
       shutdown_(false) {
   base::AutoLock lock(lock_);
 
   while (workers_.size() < num_threads) {
     scoped_ptr<base::DelegateSimpleThread> worker = make_scoped_ptr(
         new base::DelegateSimpleThread(
           this,
           thread_name_prefix +
-          StringPrintf("Worker%lu", workers_.size() + 1).c_str()));
+          base::StringPrintf("Worker%lu", workers_.size() + 1).c_str()));
     worker->Start();
     workers_.push_back(worker.Pass());
   }
 }
 
 WorkerPool::Inner::~Inner() {
   base::AutoLock lock(lock_);
 
   DCHECK(shutdown_);
 
@@ skipping 414 matching lines @@
     TRACE_EVENT_INSTANT0("cc", "WorkerPool::RunCheapTasks check time");
     CancelCheckForCompletedTasks();
     DispatchCompletionCallbacks();
     // Schedule another check for completed tasks if not idle.
     if (!is_idle)
       ScheduleCheckForCompletedTasks();
   }
 }
 
 }  // namespace cc