Rename AccountResolver#byId to accountCache

Change-Id: I5e609de45c2593ed9a547690f92f54dc49f20481
diff --git a/java/com/google/gerrit/server/account/AccountResolver.java b/java/com/google/gerrit/server/account/AccountResolver.java
index 8e1ed7e..24a2596 100644
--- a/java/com/google/gerrit/server/account/AccountResolver.java
+++ b/java/com/google/gerrit/server/account/AccountResolver.java
@@ -246,7 +246,7 @@
   private abstract class AccountIdSearcher implements Searcher<Account.Id> {
     @Override
     public final Stream<AccountState> search(Account.Id input) {
-      return Streams.stream(byId.get(input));
+      return Streams.stream(accountCache.get(input));
     }
   }
 
@@ -318,7 +318,7 @@
 
     @Override
     public Stream<AccountState> search(String input) {
-      return Streams.stream(byId.getByUsername(input));
+      return Streams.stream(accountCache.getByUsername(input));
     }
 
     @Override
@@ -461,7 +461,7 @@
           .addAll(nameOrEmailSearchers)
           .build();
 
-  private final AccountCache byId;
+  private final AccountCache accountCache;
   private final AccountControl.Factory accountControlFactory;
   private final Emails emails;
   private final IdentifiedUser.GenericFactory userFactory;
@@ -472,7 +472,7 @@
 
   @Inject
   AccountResolver(
-      AccountCache byId,
+      AccountCache accountCache,
       Emails emails,
       AccountControl.Factory accountControlFactory,
       IdentifiedUser.GenericFactory userFactory,
@@ -481,7 +481,7 @@
       Realm realm,
       @AnonymousCowardName String anonymousCowardName) {
     this.realm = realm;
-    this.byId = byId;
+    this.accountCache = accountCache;
     this.accountControlFactory = accountControlFactory;
     this.userFactory = userFactory;
     this.self = self;
@@ -608,6 +608,6 @@
   }
 
   private Stream<AccountState> toAccountStates(Set<Account.Id> ids) {
-    return byId.get(ids).values().stream();
+    return accountCache.get(ids).values().stream();
   }
 }