Make policy errors available to display in about:policy.

chrome/browser/policy/browser_policy_connector.h

Index: chrome/browser/policy/browser_policy_connector.h
diff --git a/chrome/browser/policy/browser_policy_connector.h b/chrome/browser/policy/browser_policy_connector.h
index 34966e3ebd3a7416f0af8edf7568e5f580e01126..64dffdc4cd25dbf00890650df68557e94841768d 100644
--- a/chrome/browser/policy/browser_policy_connector.h
+++ b/chrome/browser/policy/browser_policy_connector.h
@@ -12,6 +12,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/policy/cloud_policy_data_store.h"
+#include "chrome/browser/policy/configuration_policy_handler.h"
 #include "chrome/browser/policy/enterprise_install_attributes.h"
 #include "content/common/notification_observer.h"
 #include "content/common/notification_registrar.h"
@@ -108,6 +109,9 @@ class BrowserPolicyConnector : public NotificationObserver {
   const CloudPolicyDataStore* GetDeviceCloudPolicyDataStore() const;
   const CloudPolicyDataStore* GetUserCloudPolicyDataStore() const;
 
+  const ConfigurationPolicyHandler::HandlerList*
+      GetConfigurationPolicyHandlerList() const;
+
  private:
   friend class ::TestingBrowserProcess;
 
@@ -170,6 +174,9 @@ class BrowserPolicyConnector : public NotificationObserver {
   // policy authentication tokens.
   TokenService* token_service_;
 
+  // List of all available handlers derived from ConfigurationPolicyHandler.
+  scoped_ptr<ConfigurationPolicyHandler::HandlerList> policy_handlers_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserPolicyConnector);
 };