Add policies to control the disk cache size.

chrome/browser/profiles/profile_impl.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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #pragma once
 
@@ skipping 166 matching lines @@
   void EnsureSessionServiceCreated();
 
   ExtensionPrefValueMap* GetExtensionPrefValueMap();
 
   void CreateQuotaManagerAndClients();
 
   SpellCheckProfile* GetSpellCheckProfile();
 
   void UpdateProfileUserNameCache();
 
+  void GetCacheParameters(bool is_media_context,
+                          FilePath* cache_path,
+                          int* max_size);
+
   content::NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
 
   FilePath path_;
   FilePath base_cache_path_;
   scoped_ptr<ExtensionPrefValueMap> extension_pref_value_map_;
   // Keep |prefs_| on top for destruction order because |extension_prefs_|,
   // |net_pref_observer_|, |web_resource_service_|, and |io_data_| store
   // pointers to |prefs_| and shall be destructed first.
   scoped_ptr<PrefService> prefs_;
@@ skipping 94 matching lines @@
   scoped_ptr<ChromeURLDataManager> chrome_url_data_manager_;
 
   Profile::Delegate* delegate_;
 
   chrome_browser_net::Predictor* predictor_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_