Rework wifi_data_provider_linux.cc with our D-Bus library.

content/browser/geolocation/wifi_data_provider_linux.h

Index: content/browser/geolocation/wifi_data_provider_linux.h
diff --git a/content/browser/geolocation/wifi_data_provider_linux.h b/content/browser/geolocation/wifi_data_provider_linux.h
index 978bd8fcf07ed09b4cd09012cafcecc63cb2ac31..434e6e5cf6febc114a91a8502d4392afdd5bcd87 100644
--- a/content/browser/geolocation/wifi_data_provider_linux.h
+++ b/content/browser/geolocation/wifi_data_provider_linux.h
@@ -8,17 +8,26 @@
 
 #include "content/browser/geolocation/wifi_data_provider_common.h"
 
+namespace dbus {
+class Bus;
+};
+
 class WifiDataProviderLinux : public WifiDataProviderCommon {
  public:
   WifiDataProviderLinux();
 
  private:
+  friend class GeolocationWifiDataProviderLinuxTest;
+
   virtual ~WifiDataProviderLinux();
 
   // WifiDataProviderCommon
   virtual WlanApiInterface* NewWlanApi();
   virtual PollingPolicyInterface* NewPollingPolicy();
 
+  // For testing.
+  WlanApiInterface* NewWlanApiForTesting(dbus::Bus* bus);
+
   DISALLOW_COPY_AND_ASSIGN(WifiDataProviderLinux);
 };