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

chrome/browser/geolocation/device_data_provider_unittest.cc

Index: chrome/browser/geolocation/device_data_provider_unittest.cc
===================================================================
--- chrome/browser/geolocation/device_data_provider_unittest.cc	(revision 70328)
+++ chrome/browser/geolocation/device_data_provider_unittest.cc	(working copy)
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/geolocation/device_data_provider.h"
 
+#include "base/threading/platform_thread.h"
 #include "chrome/browser/geolocation/wifi_data_provider_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -27,12 +28,12 @@
   for (int i = 0; i < 10; i++) {
     DeviceDataProvider<WifiData>::Register(&listener);
     for (int j = 0; j < 10; j++) {
-      PlatformThread::Sleep(0);
+      base::PlatformThread::Sleep(0);
       main_message_loop.RunAllPending();  // See comment above
     }
     DeviceDataProvider<WifiData>::Unregister(&listener);
     for (int j = 0; j < 10; j++) {
-      PlatformThread::Sleep(0);
+      base::PlatformThread::Sleep(0);
       main_message_loop.RunAllPending();  // See comment above
     }
   }