Use a direct include of strings headers in content/browser/, part 1.

content/browser/geolocation/wifi_data_provider_common.h

 // 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.
 
 #ifndef CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
 #define CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
 
 #include <assert.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/threading/thread.h"
 #include "content/browser/geolocation/device_data_provider.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 // Converts a MAC address stored as an array of uint8 to a string.
 string16 MacAddressAsString16(const uint8 mac_as_int[6]);
 
 // Allows sharing and mocking of the update polling policy function.
@@ skipping 97 matching lines @@
 
   // Holder for the tasks which run on the thread; takes care of cleanup.
   base::WeakPtrFactory<WifiDataProviderCommon> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WifiDataProviderCommon);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_