Move platform_thread to base/threading and put in the base namespace. I left ...

chrome/test/webdriver/commands/find_element_commands.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/test/webdriver/commands/find_element_commands.h"
 
 #include <sstream>
 #include <string>
 
 #include "base/string_number_conversions.h"
+#include "base/threading/platform_thread.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "third_party/webdriver/atoms.h"
 #include "chrome/test/webdriver/error_codes.h"
 #include "chrome/test/webdriver/utility_functions.h"
 
 namespace webdriver {
 
 bool FindElementCommand::Init(Response* const response) {
   if (!WebDriverCommand::Init(response)) {
@@ skipping 72 matching lines @@
              (result->GetType() == Value::TYPE_LIST &&
              static_cast<ListValue*>(result)->GetSize() > 0);
     } else if (error != kNoSuchElement) {
       SET_WEBDRIVER_ERROR(response, "Internal error in find_element atom",
                           kInternalServerError);
       return;
     }
 
     int64 elapsed_time = (base::Time::Now() - start_time).InMilliseconds();
     done = done || elapsed_time > session_->implicit_wait();
-    PlatformThread::Sleep(50);  // Prevent a busy loop that eats the cpu.
+    base::PlatformThread::Sleep(50);  // Prevent a busy loop that eats the cpu.
   }
 
   response->set_value(result);
   response->set_status(error);
 }
 
 }  // namespace webdriver