Implemented status section functionality for about:policy.

chrome/browser/ui/webui/policy_ui.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_POLICY_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_POLICY_UI_H_
 #pragma once
 
 #include "base/scoped_ptr.h"
+#include "base/time.h"
 #include "base/values.h"
+#include "chrome/browser/policy/cloud_policy_subsystem.h"
 #include "chrome/browser/policy/configuration_policy_reader.h"
 #include "chrome/browser/ui/webui/chrome_web_ui.h"
 #include "content/common/notification_observer.h"
 
 // The base class handler of Javascript messages of the about:policy page.
-class PolicyUIHandler : public WebUIMessageHandler {
+class PolicyUIHandler : public WebUIMessageHandler,
+                        public policy::PolicyStatus::Observer {
  public:
   PolicyUIHandler();
   virtual ~PolicyUIHandler();
 
   // WebUIMessageHandler implementation.
   virtual WebUIMessageHandler* Attach(WebUI* web_ui) OVERRIDE;
   virtual void RegisterMessages() OVERRIDE;
 
+  // policy::ConfigurationPolicyReader::Observer implementation.
+  virtual void OnPolicyValuesChanged() OVERRIDE;
+
  private:
   typedef policy::ConfigurationPolicyReader ConfigurationPolicyReader;
+  typedef policy::CloudPolicySubsystem CloudPolicySubsystem;
 
-  // Callback for the "requestPolicyData" message.
-  void HandleRequestPolicyData(const ListValue* args);
+  // Callback for the "requestData" message.
+  void HandleRequestData(const ListValue* args);
+
+  // Callback for the "updateFetchTimes" message.
+  void HandleUpdateFetchTimes(const ListValue* args);
+
+  // Callback for the "fetchPolicy" message.
+  void HandleFetchPolicy(const ListValue* args);
+
+  // Send requested data to UI. If is_policy_update is true, the data is sent as
+  // a policy update, otherwise it is sent normally.
+  void SendDataToUI(bool is_policy_update);
+
+  // Returns a DictionaryValue pointer containing information about the status
+  // of the policy system.
+  DictionaryValue* GetStatusData(bool is_policy_update);
+
+  // Returns the time at which policy was last fetched by the
+  // CloudPolicySubsystem |subsystem| in string form.
+  string16 GetLastFetchTime(CloudPolicySubsystem* subsystem);
+
+  // Returns the string corresponding to the CloudPolicySubsystem::ErrorDetails
+  // enum value |error_details|.
+  static string16 CreateStatusMessageString(
+      CloudPolicySubsystem::ErrorDetails error_details);
 
   scoped_ptr<policy::PolicyStatus> policy_status_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyUIHandler);
 };
 
 // The Web UI handler for about:policy.
 class PolicyUI : public ChromeWebUI {
  public:
   explicit PolicyUI(TabContents* contents);
   virtual ~PolicyUI();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PolicyUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_POLICY_UI_H_