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content/public/common/geoposition.cc

Index: content/public/common/geoposition.cc
diff --git a/content/public/common/geoposition.cc b/content/public/common/geoposition.cc
index 3a0f1f08b1847e4e6b616a38b7e7813bc99f4446..39174222202029b5a312519d5cad8b2437574414 100644
--- a/content/public/common/geoposition.cc
+++ b/content/public/common/geoposition.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "content/public/common/geoposition.h"
+#include <math.h>
 
 namespace {
 // Sentinel values to mark invalid data. (WebKit carries companion is_valid
@@ -36,4 +37,29 @@ bool Geoposition::Validate() const {
          !timestamp.is_null();
 }
 
+// The calculations in this function are experimental and not fully accurate.
+/* static */
+Geoposition Geoposition::ApplyPrecision(const Geoposition& position,
+                                        const int precision) {
+  Geoposition newGeoposition = position;
+  switch (precision) {
+    case 1:
+      // City granuality.
+      newGeoposition.latitude = round(newGeoposition.latitude * 10.0) / 10.0;
+      newGeoposition.longitude = round(newGeoposition.longitude * 10.0) / 10.0;
+      break;
+    case 2:
+      // State granuality.
+      newGeoposition.latitude = round(newGeoposition.latitude);
+      newGeoposition.longitude = round(newGeoposition.longitude);
+      break;
+    case 3:
+      // Country granuality.
+      newGeoposition.latitude = round(newGeoposition.latitude / 10.0);
+      newGeoposition.longitude = round(newGeoposition.longitude / 10.0);
+      break;
+  }
+  return newGeoposition;
+}
+
 }  // namespace content