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

ios/chrome/browser/geolocation/CLLocation+XGeoHeader.mm

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/geolocation/CLLocation+XGeoHeader.h"
 
 #include <stdint.h>
 
 #import "third_party/google_toolbox_for_mac/src/Foundation/GTMStringEncoding.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 NSString* const kGMOLocationDescriptorFormat =
     @"role: CURRENT_LOCATION\n"
     @"producer: DEVICE_LOCATION\n"
     @"timestamp: %lld\n"
     @"radius: %ld\n"
     @"latlng <\n"
     @"  latitude_e7: %.f\n"
     @"  longitude_e7: %.f\n"
     @">";
 
 @implementation CLLocation (XGeoHeader)
 
 - (NSString*)cr_serializeStringToWebSafeBase64String:(NSString*)data {
   GTMStringEncoding* encoder =
       [GTMStringEncoding rfc4648Base64WebsafeStringEncoding];
   NSString* base64 =
       [encoder encode:[data dataUsingEncoding:NSUTF8StringEncoding]
                 error:nullptr];
   if (base64) {
     return base64;
-  } else {
-    return @"";
   }
+  return @"";
 }
 
 // Returns the timestamp of this location in microseconds since the UNIX epoch.
 // Returns 0 if the timestamp is unavailable or invalid.
 - (int64_t)cr_timestampInMicroseconds {
   NSTimeInterval seconds = [self.timestamp timeIntervalSince1970];
   if (seconds > 0) {
     const int64_t kSecondsToMicroseconds = 1000000;
     return (int64_t)(seconds * kSecondsToMicroseconds);
   }
@@ skipping 23 matching lines @@
 
 - (NSString*)cr_xGeoString {
   NSString* locationDescriptor = [self cr_locationDescriptor];
   // The "a" indicates that it is an ASCII proto.
   return [NSString
       stringWithFormat:@"a %@", [self cr_serializeStringToWebSafeBase64String:
                                           locationDescriptor]];
 }
 
 @end