Allow policy refresh rate to be configured through policy.

chrome/browser/policy/profile_policy_context.h

Index: chrome/browser/policy/profile_policy_context.h
diff --git a/chrome/browser/policy/profile_policy_context.h b/chrome/browser/policy/profile_policy_context.h
index b343e1566db1229589892d19e62acfd6a4445059..8650ec54dba262fe5aa6e94647fc1e777fa4ee05 100644
--- a/chrome/browser/policy/profile_policy_context.h
+++ b/chrome/browser/policy/profile_policy_context.h
@@ -7,6 +7,8 @@
 #pragma once
 
 #include "base/scoped_ptr.h"
+#include "chrome/browser/prefs/pref_member.h"
+#include "chrome/common/notification_observer.h"
 
 class Profile;
 
@@ -19,7 +21,7 @@ class DeviceManagementService;
 // profile. Since the context owns the policy provider, it's vital that it gets
 // initialized before the profile's prefs and destroyed after the prefs are
 // gone.
-class ProfilePolicyContext {
+class ProfilePolicyContext : public NotificationObserver {
  public:
   explicit ProfilePolicyContext(Profile* profile);
   ~ProfilePolicyContext();
@@ -35,10 +37,27 @@ class ProfilePolicyContext {
   // Get the policy provider.
   DeviceManagementPolicyProvider* GetDeviceManagementPolicyProvider();
 
+  // Register preferences.
+  static void RegisterUserPrefs(PrefService* user_prefs);
+
+  static const int kDefaultPolicyRefreshRateInMilliseconds =
+      3 * 60 * 60 * 1000; // 3 hours.
+
  private:
+  // Updates the policy provider with a new refresh rate value.
+  void UpdatePolicyRefreshRate();
+
+  // NotificationObserver overrides.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
   // The profile this context is associated with.
   Profile* profile_;
 
+  // Tracks the pref value for the policy refresh rate.
+  IntegerPrefMember policy_refresh_rate_;
+
   // The device management service.
   scoped_ptr<DeviceManagementService> device_management_service_;