Cleaner organization of WifiDataProvider code.

content/browser/geolocation/empty_wifi_data_provider.h

 // 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.
 
 #ifndef CONTENT_BROWSER_GEOLOCATION_EMPTY_WIFI_DATA_PROVIDER_H_
 #define CONTENT_BROWSER_GEOLOCATION_EMPTY_WIFI_DATA_PROVIDER_H_
 
 #include "content/browser/geolocation/wifi_data_provider.h"
 
 namespace content {
 
-// An implementation of WifiDataProviderImplBase that does not provide any
+// An implementation of WifiDataProvider that does not provide any
 // data. Used on platforms where a real implementation is not available.
-class EmptyWifiDataProvider : public WifiDataProviderImplBase {
+class EmptyWifiDataProvider : public WifiDataProvider {
  public:
   EmptyWifiDataProvider();
 
-  // WifiDataProviderImplBase implementation
+  // WifiDataProvider implementation
   virtual void StartDataProvider() OVERRIDE { }
   virtual void StopDataProvider() OVERRIDE { }
   virtual bool GetData(WifiData* data) OVERRIDE;
 
  private:
   virtual ~EmptyWifiDataProvider();
 
   DISALLOW_COPY_AND_ASSIGN(EmptyWifiDataProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_EMPTY_WIFI_DATA_PROVIDER_H_