Make policy errors available to display in about:policy.

ui/base/resource/resource_bundle.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 UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_
 #define UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 86 matching lines @@
 
   // Registers additional data pack files with the global ResourceBundle.  When
   // looking for a DataResource, we will search these files after searching the
   // main module.  This method is not thread safe!  You should call it
   // immediately after calling InitSharedInstance.
   static void AddDataPackToSharedInstance(const FilePath& path);
 
   // Delete the ResourceBundle for this process if it exists.
   static void CleanupSharedInstance();
 
+  // Returns true after the global resource loader instance has been created.
+  static bool HasSharedInstance();
+
   // Return the global resource loader instance.
   static ResourceBundle& GetSharedInstance();
 
   // Check if the .pak for the given locale exists.
   static bool LocaleDataPakExists(const std::string& locale);
 
   // Gets the bitmap with the specified resource_id from the current module
   // data. Returns a pointer to a shared instance of the SkBitmap. This shared
   // bitmap is owned by the resource bundle and should not be freed.
   //
@@ skipping 193 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ResourceBundle);
 };
 
 }  // namespace ui
 
 // TODO(beng): Someday, maybe, get rid of this.
 using ui::ResourceBundle;
 
 #endif  // UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_