[Android]Don't check for child account/EDU device for every activity.

chrome/android/java/src/org/chromium/chrome/browser/preferences/SignInPreference.java

 // Copyright 2015 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.preferences;
 
 import android.accounts.Account;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.drawable.BitmapDrawable;
 import android.preference.Preference;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.View;
 
 import org.chromium.chrome.R;
-import org.chromium.chrome.browser.firstrun.FirstRunSignInProcessor;
+import org.chromium.chrome.browser.firstrun.FirstRunSigninProcessor;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.profiles.ProfileDownloader;
 import org.chromium.chrome.browser.signin.AccountManagementFragment;
 import org.chromium.chrome.browser.signin.SigninManager;
 import org.chromium.chrome.browser.signin.SigninManager.SignInAllowedObserver;
 import org.chromium.sync.signin.AccountManagerHelper;
 import org.chromium.sync.signin.ChromeSigninController;
 
 import java.util.List;
 
@@ skipping 15 matching lines @@
         update();
     }
 
     /**
      * Starts listening for updates to the sign-in state.
      */
     public void registerForUpdates() {
         SigninManager manager = SigninManager.get(getContext());
         manager.addSignInAllowedObserver(this);
         ProfileDownloader.addObserver(this);
-        FirstRunSignInProcessor.updateSigninManagerFirstRunCheckDone(getContext());
+        FirstRunSigninProcessor.updateSigninManagerFirstRunCheckDone(getContext());
     }
 
     /**
      * Stops listening for updates to the sign-in state. Every call to registerForUpdates() must
      * be matched with a call to this method.
      */
     public void unregisterForUpdates() {
         SigninManager manager = SigninManager.get(getContext());
         manager.removeSignInAllowedObserver(this);
         ProfileDownloader.removeObserver(this);
@@ skipping 75 matching lines @@
 
     // ProfileDownloader.Observer
 
     @Override
     public void onProfileDownloaded(String accountId, String fullName, String givenName,
             Bitmap bitmap) {
         AccountManagementFragment.updateUserNamePictureCache(accountId, fullName, bitmap);
         update();
     }
 }