Move AsyncTask helpers for accounts and features getters to AccountManagerHelper

components/signin/core/browser/android/java/src/org/chromium/components/signin/SystemAccountManagerDelegate.java

Index: components/signin/core/browser/android/java/src/org/chromium/components/signin/SystemAccountManagerDelegate.java
diff --git a/components/signin/core/browser/android/java/src/org/chromium/components/signin/SystemAccountManagerDelegate.java b/components/signin/core/browser/android/java/src/org/chromium/components/signin/SystemAccountManagerDelegate.java
index 6cc91e8c3a598fb0061c99b921481f71e47c17a0..59767799a3df0857fbaf350095ffd28ad948ce76 100644
--- a/components/signin/core/browser/android/java/src/org/chromium/components/signin/SystemAccountManagerDelegate.java
+++ b/components/signin/core/browser/android/java/src/org/chromium/components/signin/SystemAccountManagerDelegate.java
@@ -15,7 +15,6 @@ import android.accounts.OperationCanceledException;
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
-import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Process;
@@ -64,21 +63,6 @@ public class SystemAccountManagerDelegate implements AccountManagerDelegate {
     }
 
     @Override
-    public void getAccountsByType(final String type, final Callback<Account[]> callback) {
-        new AsyncTask<Void, Void, Account[]>() {
-            @Override
-            protected Account[] doInBackground(Void... params) {
-                return getAccountsByType(type);
-            }
-
-            @Override
-            protected void onPostExecute(Account[] accounts) {
-                callback.onResult(accounts);
-            }
-        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
-    }
-
-    @Override
     public String getAuthToken(Account account, String authTokenScope) throws AuthException {
         assert !ThreadUtils.runningOnUiThread();
         assert AccountManagerHelper.GOOGLE_ACCOUNT_TYPE.equals(account.type);
@@ -128,23 +112,6 @@ public class SystemAccountManagerDelegate implements AccountManagerDelegate {
         return false;
     }
 
-    @Override
-    public void hasFeatures(
-            final Account account, final String[] features, final Callback<Boolean> callback) {
-        AsyncTask<Void, Void, Boolean> task = new AsyncTask<Void, Void, Boolean>() {
-            @Override
-            public Boolean doInBackground(Void... params) {
-                return hasFeatures(account, features);
-            }
-
-            @Override
-            public void onPostExecute(Boolean value) {
-                callback.onResult(value);
-            }
-        };
-        task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
-    }
-
     /**
      * Records a histogram value for how long time an action has taken using
      * {@link RecordHistogram#recordTimesHistogram(String, long, TimeUnit))} iff the browser