Implemented status section functionality for about:policy.

chrome/browser/ui/webui/policy_ui.h

Index: chrome/browser/ui/webui/policy_ui.h
diff --git a/chrome/browser/ui/webui/policy_ui.h b/chrome/browser/ui/webui/policy_ui.h
index f773a4bdff31cdde246883fc696a2e2a937cf679..8e40537eb664a53dce0b2bc72c16c950d46f88a6 100644
--- a/chrome/browser/ui/webui/policy_ui.h
+++ b/chrome/browser/ui/webui/policy_ui.h
@@ -7,13 +7,16 @@
 #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();
@@ -22,11 +25,38 @@ class PolicyUIHandler : public WebUIMessageHandler {
   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 "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);
 
-  // Callback for the "requestPolicyData" message.
-  void HandleRequestPolicyData(const ListValue* args);
+  // 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_;