[ObjC ARC] Converts ios/chrome/browser/geolocation:geolocation to ARC.Automatically generated ARC…

ios/chrome/browser/geolocation/omnibox_geolocation_local_state.mm

Index: ios/chrome/browser/geolocation/omnibox_geolocation_local_state.mm
diff --git a/ios/chrome/browser/geolocation/omnibox_geolocation_local_state.mm b/ios/chrome/browser/geolocation/omnibox_geolocation_local_state.mm
index c195f46f55e75b3076259809f08b4069af0f5230..c3a664210eb1d7610c187ce8186e1c019b19cc32 100644
--- a/ios/chrome/browser/geolocation/omnibox_geolocation_local_state.mm
+++ b/ios/chrome/browser/geolocation/omnibox_geolocation_local_state.mm
@@ -14,6 +14,10 @@
 #import "ios/chrome/browser/geolocation/location_manager.h"
 #import "ios/chrome/browser/pref_names.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface OmniboxGeolocationLocalState () {
   base::scoped_nsobject<LocationManager> locationManager_;
 }
@@ -39,7 +43,7 @@
   DCHECK(locationManager);
   self = [super init];
   if (self) {
-    locationManager_.reset([locationManager retain]);
+    locationManager_.reset(locationManager);
   }
   return self;
 }