Surface error messages from ONC parsing in about:policy.

chrome/browser/policy/configuration_policy_handler.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_POLICY_CONFIGURATION_POLICY_HANDLER_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_HANDLER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 42 matching lines @@
   TypeCheckingPolicyHandler(ConfigurationPolicyType policy_type,
                             base::Value::Type value_type);
 
   // ConfigurationPolicyHandler methods:
   virtual bool CheckPolicySettings(const PolicyMap& policies,
                                    PolicyErrorMap* errors) OVERRIDE;
 
  protected:
   virtual ~TypeCheckingPolicyHandler();
 
+  // Runs policy checks and returns the policy value if successful.
+  bool CheckAndGetValue(const PolicyMap& policies,
+                        PolicyErrorMap* errors,
+                        const Value** value);
+
   ConfigurationPolicyType policy_type() const;
 
  private:
   // The ConfigurationPolicyType of the policy.
   ConfigurationPolicyType policy_type_;
 
   // The type the value of the policy should have.
   base::Value::Type value_type_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeCheckingPolicyHandler);
@@ skipping 204 matching lines @@
   virtual void ApplyPolicySettings(const PolicyMap& policies,
                                    PrefValueMap* prefs) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(JavascriptPolicyHandler);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_HANDLER_H_