Geolocation: move polling policy to its own file.

content/browser/geolocation/wifi_data_provider_mac.cc

Index: content/browser/geolocation/wifi_data_provider_mac.cc
diff --git a/content/browser/geolocation/wifi_data_provider_mac.cc b/content/browser/geolocation/wifi_data_provider_mac.cc
index f1f3755529a8ce5c291feb41556b2e7001c867d3..e7d8e8247f9bf2261240d817b4b3878dbab46a40 100644
--- a/content/browser/geolocation/wifi_data_provider_mac.cc
+++ b/content/browser/geolocation/wifi_data_provider_mac.cc
@@ -184,11 +184,11 @@ MacWifiDataProvider::WlanApiInterface* MacWifiDataProvider::NewWlanApi() {
   return NULL;
 }
 
-PollingPolicyInterface* MacWifiDataProvider::NewPollingPolicy() {
-  return new GenericPollingPolicy<kDefaultPollingInterval,
-                                  kNoChangePollingInterval,
-                                  kTwoNoChangePollingInterval,
-                                  kNoWifiPollingIntervalMilliseconds>;
+WifiPollingPolicy* MacWifiDataProvider::NewPollingPolicy() {
+  return new GenericWifiPollingPolicy<kDefaultPollingInterval,
+                                      kNoChangePollingInterval,
+                                      kTwoNoChangePollingInterval,
+                                      kNoWifiPollingIntervalMilliseconds>;
 }
 
 }  // namespace content