Convert StatusCallback to RepeatingCallback

This CL converts the DeviceOAuth2TokenService::StatusCallback
from base::Callback to base::RepeatingCallback.

This is a code health CL, no behavior change is expected.

Bug: 1007635
Change-Id: I956bbc22308bcf92be9e971889ccf9d047f9fa00
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2277097
Auto-Submit: Xida Chen <xidachen@chromium.org>
Reviewed-by: Anqing Zhao <anqing@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784371}

chrome/browser/device_identity/device_oauth2_token_service.cc

@@ -63,11 +63,11 @@ DeviceOAuth2TokenService::~DeviceOAuth2TokenService() {
 
 void DeviceOAuth2TokenService::SetAndSaveRefreshToken(
     const std::string& refresh_token,
-    const StatusCallback& result_callback) {
+    StatusCallback result_callback) {
   ReportServiceError(GoogleServiceAuthError::REQUEST_CANCELED);
 
   state_ = STATE_VALIDATION_PENDING;
-  store_->SetAndSaveRefreshToken(refresh_token, result_callback);
+  store_->SetAndSaveRefreshToken(refresh_token, std::move(result_callback));
 }
 
 CoreAccountId DeviceOAuth2TokenService::GetRobotAccountId() const {

chrome/browser/device_identity/device_oauth2_token_service.h

@@ -34,13 +34,13 @@ class DeviceOAuth2TokenService : public OAuth2AccessTokenManager::Delegate,
                                  public DeviceOAuth2TokenStore::Observer {
  public:
   typedef base::RepeatingCallback<void()> RefreshTokenAvailableCallback;
-  typedef base::Callback<void(bool)> StatusCallback;
+  typedef base::RepeatingCallback<void(bool)> StatusCallback;
 
   // Persist the given refresh token on the device. Overwrites any previous
   // value. Should only be called during initial device setup. Signals
   // completion via the given callback, passing true if the operation succeeded.
   void SetAndSaveRefreshToken(const std::string& refresh_token,
-                              const StatusCallback& callback);
+                              StatusCallback callback);
 
   // Pull the robot account ID from device policy.
   CoreAccountId GetRobotAccountId() const;