Allow ProxyConfigService to report "no configuration set"

chrome/test/testing_pref_service.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_TEST_TESTING_PREF_SERVICE_H_
 #define CHROME_TEST_TESTING_PREF_SERVICE_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 17 matching lines @@
 
   // Clear the preference on the managed layer and fire observers if the
   // preference has been defined previously.
   void RemoveManagedPref(const char* path);
 
   // Similar to the above, but for user preferences.
   const Value* GetUserPref(const char* path) const;
   void SetUserPref(const char* path, Value* value);
   void RemoveUserPref(const char* path);
 
+  // Similar to the above, but for recommended policy preferences.
+  const Value* GetRecommendedPref(const char* path) const;
+  void SetRecommendedPref(const char* path, Value* value);
+  void RemoveRecommendedPref(const char* path);
+
  protected:
   TestingPrefServiceBase(
       TestingPrefStore* managed_platform_prefs,
-      TestingPrefStore* user_prefs);
+      TestingPrefStore* user_prefs,
+      TestingPrefStore* recommended_platform_prefs);
 
  private:
   // Reads the value of the preference indicated by |path| from |pref_store|.
   // Returns NULL if the preference was not found.
   const Value* GetPref(TestingPrefStore* pref_store, const char* path) const;
 
   // Sets the value for |path| in |pref_store|.
   void SetPref(TestingPrefStore* pref_store, const char* path, Value* value);
 
   // Removes the preference identified by |path| from |pref_store|.
   void RemovePref(TestingPrefStore* pref_store, const char* path);
 
   // Pointers to the pref stores our value store uses.
   scoped_refptr<TestingPrefStore> managed_platform_prefs_;
   scoped_refptr<TestingPrefStore> user_prefs_;
+  scoped_refptr<TestingPrefStore> recommended_platform_prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceBase);
 };
 
 // Class for simplified construction of TestPrefServiceBase objects.
 class TestingPrefService : public TestingPrefServiceBase {
  public:
   TestingPrefService();
   virtual ~TestingPrefService();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestingPrefService);
 };
 
 #endif  // CHROME_TEST_TESTING_PREF_SERVICE_H_