[Webview, Child Accounts] Automatically sign in to Chrome if needed.

chrome/browser/supervised_user/child_accounts/child_account_service_android.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/supervised_user/child_accounts/child_account_service_android.h"
 
+#include "base/bind.h"
+
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/supervised_user/child_accounts/child_account_service.h"
+#include "chrome/browser/supervised_user/child_accounts/child_account_service_factory.h"
 #include "jni/ChildAccountService_jni.h"
 
 using base::android::JavaParamRef;
+using base::android::ScopedJavaGlobalRef;
 
 jboolean IsChildAccount(JNIEnv* env, const JavaParamRef<jclass>& jcaller) {
   ProfileManager* profile_manager = g_browser_process->profile_manager();
   return profile_manager->GetLastUsedProfile()->IsChild();
 }
 
 bool RegisterChildAccountService(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
+
+void ListenForChildStatusReceived(JNIEnv* env,
+                                  const JavaParamRef<jclass>& jcaller,
+                                  const JavaParamRef<jobject>& callback) {
+  ProfileManager* profile_manager = g_browser_process->profile_manager();
+  ChildAccountService* service = ChildAccountServiceFactory::GetForProfile(
+      profile_manager->GetLastUsedProfile());
+  service->AddChildStatusReceivedCallback(
+      base::Bind(&Java_ChildAccountService_childStatusReceived, env,

[Bernhard Bauer, 2017/02/15 15:09:38]

Don't hold on to the JNIEnv* by binding it into the callback. Instead use a
callback to a static method and get the JNIEnv there by attaching to the current
thread.

[aberent, 2017/02/15 18:34:46]

Actually switched to binding RunCallbackAndroid, which doesn't need either a
JNIEnv or a new static method.

+                 ScopedJavaGlobalRef<jobject>(callback)));
+}