Add compiler-specific "examine printf format" attributes to printfs.

base/worker_pool_linux.cc

 // Copyright (c) 2006-2008 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 "base/worker_pool.h"
 #include "base/worker_pool_linux.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/platform_thread.h"
@@ skipping 49 matching lines @@
  private:
   const std::string name_prefix_;
   const int idle_seconds_before_exit_;
   scoped_refptr<base::LinuxDynamicThreadPool> pool_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerThread);
 };
 
 void WorkerThread::ThreadMain() {
   const std::string name =
-      StringPrintf("%s/%d", name_prefix_.c_str(),
-                   IntToString(PlatformThread::CurrentId()).c_str());
+      StringPrintf("%s/%d", name_prefix_.c_str(), PlatformThread::CurrentId());
   PlatformThread::SetName(name.c_str());
 
   for (;;) {
     Task* task = pool_->WaitForTask();
     if (!task)
       break;
     task->Run();
     delete task;
   }
 
@@ skipping 78 matching lines @@
       return NULL;
     }
   }
 
   Task* task = tasks_.front();
   tasks_.pop();
   return task;
 }
 
 }  // namespace base