Add support for child accounts on Android.

chrome/browser/supervised_user/child_accounts/child_account_service.h

Index: chrome/browser/supervised_user/child_accounts/child_account_service.h
diff --git a/chrome/browser/supervised_user/child_accounts/child_account_service.h b/chrome/browser/supervised_user/child_accounts/child_account_service.h
index 11c713ae2bd4da69e5e66ce855903417dd138a2f..3eed1044c1ede73c0ac31a15b2a1089d9514743e 100644
--- a/chrome/browser/supervised_user/child_accounts/child_account_service.h
+++ b/chrome/browser/supervised_user/child_accounts/child_account_service.h
@@ -35,6 +35,11 @@ class ChildAccountService : public KeyedService,
 
   void Init();
 
+  // Sets whether the signed-in account is a child account.
+  // Public so it can be called on platforms where child account detection
+  // happens outside of this class (like Android).
+  void SetIsChildAccount(bool is_child_account);
+
   // KeyedService:
   virtual void Shutdown() override;
 
@@ -67,8 +72,6 @@ class ChildAccountService : public KeyedService,
   void OnFlagsFetched(AccountServiceFlagFetcher::ResultCode,
                       const std::vector<std::string>& flags);
 
-  void SetIsChildAccount(bool is_child_account);
-
   void PropagateChildStatusToUser(bool is_child);
 
   void SetFirstCustodianPrefs(const FamilyInfoFetcher::FamilyMember& custodian);