Fix policy invalidator lifecycle bugs for Android.

chrome/browser/policy/cloud/cloud_policy_core.cc

 // Copyright (c) 2012 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/policy/cloud/cloud_policy_core.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/policy/cloud/cloud_policy_client.h"
 #include "chrome/browser/policy/cloud/cloud_policy_refresh_scheduler.h"
 #include "chrome/browser/policy/cloud/cloud_policy_service.h"
 #include "chrome/browser/policy/cloud/cloud_policy_store.h"
 
 namespace policy {
 
+CloudPolicyCore::Observer::~Observer() {}
+
 CloudPolicyCore::CloudPolicyCore(const PolicyNamespaceKey& key,
                                  CloudPolicyStore* store)
     : policy_ns_key_(key),
       store_(store) {}
 
 CloudPolicyCore::~CloudPolicyCore() {}
 
 void CloudPolicyCore::Connect(scoped_ptr<CloudPolicyClient> client) {
   CHECK(!client_);
   CHECK(client);
   client_ = client.Pass();
   service_.reset(new CloudPolicyService(policy_ns_key_, client_.get(), store_));
+  FOR_EACH_OBSERVER(Observer, observers_, OnCoreConnected(this));
 }
 
 void CloudPolicyCore::Disconnect() {
+  if (client_)
+    FOR_EACH_OBSERVER(Observer, observers_, OnCoreDisconnecting(this));
   refresh_delay_.reset();
   refresh_scheduler_.reset();
   service_.reset();
   client_.reset();
 }
 
 void CloudPolicyCore::RefreshSoon() {
  if (refresh_scheduler_)
     refresh_scheduler_->RefreshSoon();
 }
 
 void CloudPolicyCore::StartRefreshScheduler() {
   if (!refresh_scheduler_) {
     refresh_scheduler_.reset(
         new CloudPolicyRefreshScheduler(
             client_.get(), store_,
             base::MessageLoop::current()->message_loop_proxy()));
     UpdateRefreshDelayFromPref();
+    FOR_EACH_OBSERVER(Observer, observers_, OnRefreshSchedulerStarted(this));
   }
 }
 
 void CloudPolicyCore::TrackRefreshDelayPref(
     PrefService* pref_service,
     const std::string& refresh_pref_name) {
   refresh_delay_.reset(new IntegerPrefMember());
   refresh_delay_->Init(
       refresh_pref_name.c_str(), pref_service,
       base::Bind(&CloudPolicyCore::UpdateRefreshDelayFromPref,
                  base::Unretained(this)));
   UpdateRefreshDelayFromPref();
 }
 
+void CloudPolicyCore::AddObserver(CloudPolicyCore::Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void CloudPolicyCore::RemoveObserver(CloudPolicyCore::Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
 void CloudPolicyCore::UpdateRefreshDelayFromPref() {
   if (refresh_scheduler_ && refresh_delay_)
     refresh_scheduler_->SetRefreshDelay(refresh_delay_->GetValue());
 }
 
 }  // namespace policy