Geolocation: log the number of wifi access points used to determine location.

content/browser/geolocation/network_location_request.cc

Index: content/browser/geolocation/network_location_request.cc
diff --git a/content/browser/geolocation/network_location_request.cc b/content/browser/geolocation/network_location_request.cc
index 9418a3f537d0917640606af8dec7989b25ff1592..41f3cea1fbf030db36612b352b5b379a2ec21962 100644
--- a/content/browser/geolocation/network_location_request.cc
+++ b/content/browser/geolocation/network_location_request.cc
@@ -58,6 +58,14 @@ void RecordUmaResponseCode(int code) {
       code);
 }
 
+void RecordUmaAccessPoints(int count) {
+  const int min = 0;
+  const int max = 10;
+  const int buckets = 11;
+  UMA_HISTOGRAM_CUSTOM_COUNTS("Geolocation.NetworkLocationRequest.AccessPoints",
+      count, min, max, buckets);
+}
+
 // Local functions
 // Creates the request url to send to the server.
 GURL FormRequestURL(const GURL& url);
@@ -107,6 +115,7 @@ bool NetworkLocationRequest::MakeRequest(const string16& access_token,
                                          const WifiData& wifi_data,
                                          const base::Time& timestamp) {
   RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_REQUEST_START);
+  RecordUmaAccessPoints(wifi_data.access_point_data.size());
   if (url_fetcher_ != NULL) {
     DVLOG(1) << "NetworkLocationRequest : Cancelling pending request";
     RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_REQUEST_CANCEL);