Move AsyncTask helpers for accounts and features getters to AccountManagerHelper

components/signin/core/browser/android/javatests/src/org/chromium/components/signin/test/util/MockAccountManager.java

Index: components/signin/core/browser/android/javatests/src/org/chromium/components/signin/test/util/MockAccountManager.java
diff --git a/components/signin/core/browser/android/javatests/src/org/chromium/components/signin/test/util/MockAccountManager.java b/components/signin/core/browser/android/javatests/src/org/chromium/components/signin/test/util/MockAccountManager.java
index a7fa08435c25b3d08ec4be6e54c5e36c6dbe37b1..7d85711cb111a6b5ba35657ccf43503a19f2897e 100644
--- a/components/signin/core/browser/android/javatests/src/org/chromium/components/signin/test/util/MockAccountManager.java
+++ b/components/signin/core/browser/android/javatests/src/org/chromium/components/signin/test/util/MockAccountManager.java
@@ -8,7 +8,6 @@ import android.accounts.Account;
 import android.accounts.AuthenticatorDescription;
 import android.app.Activity;
 import android.content.Context;
-import android.os.AsyncTask;
 
 import org.chromium.base.Callback;
 import org.chromium.base.Log;
@@ -73,23 +72,6 @@ public class MockAccountManager implements AccountManagerDelegate {
         return validAccounts.toArray(new Account[0]);
     }
 
-    @Override
-    public void getAccountsByType(final String type, final Callback<Account[]> callback) {
-        mGetAccountsTaskCounter.increment();
-        new AsyncTask<Void, Void, Account[]>() {
-            @Override
-            protected Account[] doInBackground(Void... params) {
-                return getAccountsByType(type);
-            }
-
-            @Override
-            protected void onPostExecute(Account[] accounts) {
-                callback.onResult(accounts);
-                mGetAccountsTaskCounter.decrement();
-            }
-        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
-    }
-
     @VisibleForTesting
     public void waitForGetAccountsTask() throws InterruptedException {
         // Wait until all tasks are done because we don't know which is being waited for.
@@ -170,17 +152,6 @@ public class MockAccountManager implements AccountManagerDelegate {
     }
 
     @Override
-    public void hasFeatures(
-            final Account account, final String[] features, final Callback<Boolean> callback) {
-        ThreadUtils.postOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                callback.onResult(hasFeatures(account, features));
-            }
-        });
-    }
-
-    @Override
     public void updateCredentials(
             Account account, Activity activity, final Callback<Boolean> callback) {
         ThreadUtils.assertOnUiThread();