Add progress and timeout dialogs for getting account management policy

chrome/android/java/src/org/chromium/chrome/browser/signin/SigninManager.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.signin;
 
 import android.accounts.Account;
 import android.app.Activity;
 import android.content.Context;
 import android.os.Handler;
@@ skipping 626 matching lines @@
 
     @CalledByNative
     private void onSigninAllowedByPolicyChanged(boolean newSigninAllowedByPolicy) {
         mSigninAllowedByPolicy = newSigninAllowedByPolicy;
         notifySignInAllowedChanged();
     }
 
     /**
      * Performs an asynchronous check to see if the user is a managed user.
      * @param callback A callback to be called with true if the user is a managed user and false
-     *         otherwise.
+     *         otherwise. Can be called directly from this function.

[msarda, 2017/03/28 11:09:02]

Optional nit: s/Can be called directly from this function./May be called
synchronously from this function.

[bsazonov, 2017/03/28 12:59:58]

Done.

      */
     public static void isUserManaged(String email, final Callback<Boolean> callback) {
         if (nativeShouldLoadPolicyForUser(email)) {
             nativeIsUserManaged(email, callback);
         } else {
-            // Although we know the result immediately, the caller may not be able to handle the
-            // callback being executed during this method call. So we post the callback on the
-            // looper.
-            ThreadUtils.postOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    callback.onResult(false);
-                }
-            });
+            callback.onResult(false);
         }
     }
 
     public static String extractDomainName(String email) {
         return nativeExtractDomainName(email);
     }
 
     @VisibleForTesting
     public static void setInstanceForTesting(SigninManager signinManager) {
         sSigninManager = signinManager;
@@ skipping 13 matching lines @@
     private native void nativeOnSignInCompleted(long nativeSigninManagerAndroid, String username);
     private native void nativeSignOut(long nativeSigninManagerAndroid);
     private native String nativeGetManagementDomain(long nativeSigninManagerAndroid);
     private native void nativeWipeProfileData(long nativeSigninManagerAndroid, WipeDataHooks hooks);
     private native void nativeClearLastSignedInUser(long nativeSigninManagerAndroid);
     private native void nativeLogInSignedInUser(long nativeSigninManagerAndroid);
     private native boolean nativeIsSignedInOnNative(long nativeSigninManagerAndroid);
     private native void nativeProhibitSignout(
             long nativeSigninManagerAndroid, boolean prohibitSignout);
 }