s/\bArc\b/ARC/g for ARC related code.

chrome/browser/chromeos/arc/arc_optin_uma.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_OPTIN_UMA_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_OPTIN_UMA_H_
 
 #include <ostream>
 
 namespace base {
 class TimeDelta;
 }
 
 namespace arc {
 
 // These enums are used to define the buckets for an enumerated UMA histogram
 // and need to be synced with histograms.xml
 enum class OptInActionType : int {
-  OPTED_OUT = 0,               // Arc was opted out by user.
-  OPTED_IN = 1,                // Arc was opted in by user.
-  NOTIFICATION_ACCEPTED = 2,   // Arc OptIn notification was accepted.
-  NOTIFICATION_DECLINED = 3,   // Arc OptIn notification was declined.
-  NOTIFICATION_TIMED_OUT = 4,  // Arc OptIn notification was timed out.
+  OPTED_OUT = 0,               // ARC was opted out by user.
+  OPTED_IN = 1,                // ARC was opted in by user.
+  NOTIFICATION_ACCEPTED = 2,   // ARC OptIn notification was accepted.
+  NOTIFICATION_DECLINED = 3,   // ARC OptIn notification was declined.
+  NOTIFICATION_TIMED_OUT = 4,  // ARC OptIn notification was timed out.
   RETRY = 5,                   // User asked to retry OptIn.
   SIZE,                        // The size of this enum; keep last.
 };
 
 enum class OptInCancelReason {
   USER_CANCEL = 0,          // Canceled by user.
   UNKNOWN_ERROR = 1,        // Unclassified failure.
   NETWORK_ERROR = 2,        // Network failure.
   SERVICE_UNAVAILABLE = 3,  // GMS Services are not available.
   DEPRECATED_BAD_AUTHENTICATION = 4,
@@ skipping 87 matching lines @@
                               bool success,
                               bool managed);
 void UpdateSilentAuthCodeUMA(OptInSilentAuthCode state);
 
 // Outputs the stringified |result| to |os|. This is only for logging purposes.
 std::ostream& operator<<(std::ostream& os, const ProvisioningResult& result);
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_OPTIN_UMA_H_