Delegating the "are images allowed" decision to renderer.

chrome/browser/content_settings/host_content_settings_map.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.
 
 // Maps hostnames to custom content settings.  Written on the UI thread and read
 // on any thread.  One instance per profile.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #pragma once
@@ skipping 31 matching lines @@
       public base::RefCountedThreadSafe<HostContentSettingsMap> {
  public:
   enum ProviderType {
     POLICY_PROVIDER = 0,
     EXTENSION_PROVIDER = 1,
     PREF_PROVIDER,
     DEFAULT_PROVIDER,
     NUM_PROVIDER_TYPES,
   };
 
-  // TODO(markusheintz): I sold my soul to the devil on order to add this tuple.
-  // I really want my soul back, so I really will change this ASAP.
-  typedef Tuple5<ContentSettingsPattern,
-                 ContentSettingsPattern,
-                 ContentSetting,
-                 std::string,
-                 bool> PatternSettingSourceTuple;
-  typedef std::vector<PatternSettingSourceTuple> SettingsForOneType;
-
   HostContentSettingsMap(PrefService* prefs,
                          ExtensionService* extension_service,
                          bool incognito);
 
   static void RegisterUserPrefs(PrefService* prefs);
 
   // Returns the default setting for a particular content type. If |provider_id|
   // is not NULL, the id of the provider which provided the default setting is
   // assigned to it.
   //
@@ skipping 48 matching lines @@
   // Returns all ContentSettings which apply to the given URLs. For content
   // setting types that require an additional resource identifier, the default
   // content setting is returned.
   //
   // This may be called on any thread.
   ContentSettings GetContentSettings(
       const GURL& primary_url,
       const GURL& secondary_url) const;
 
   // For a given content type, returns all patterns with a non-default setting,
-  // mapped to their actual settings, in lexicographical order.  |settings|
-  // must be a non-NULL outparam. If this map was created for the
-  // incognito profile, it will only return those settings differing from
-  // the main map. For ContentSettingsTypes that require an resource identifier
-  // to be specified, the |resource_identifier| must be non-empty.
+  // mapped to their actual settings, in the precedence order of the rules.
+  // |settings| must be a non-NULL outparam.
   //
   // This may be called on any thread.
   void GetSettingsForOneType(ContentSettingsType content_type,
                              const std::string& resource_identifier,
-                             SettingsForOneType* settings) const;
+                             ContentSettingsForOneType* settings) const;
 
   // Sets the default setting for a particular content type. This method must
   // not be invoked on an incognito map.
   //
   // This should only be called on the UI thread.
   void SetDefaultContentSetting(ContentSettingsType content_type,
                                 ContentSetting setting);
 
   // Sets the content setting for the given patterns and content type.
   // Setting the value to CONTENT_SETTING_DEFAULT causes the default setting
@@ skipping 80 matching lines @@
   // Adds content settings for |content_type| and |resource_identifier|,
   // provided by |provider|, into |settings|. If |incognito| is true, adds only
   // the content settings which are applicable to the incognito mode and differ
   // from the normal mode. Otherwise, adds the content settings for the normal
   // mode.
   void AddSettingsForOneType(
       const content_settings::ProviderInterface* provider,
       ProviderType provider_type,
       ContentSettingsType content_type,
       const std::string& resource_identifier,
-      SettingsForOneType* settings,
+      ContentSettingsForOneType* settings,
       bool incognito) const;
 
   // Weak; owned by the Profile.
   PrefService* prefs_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   // Whether this settings map is for an OTR session.
   bool is_off_the_record_;
 
   // Whether we are currently updating preferences, this is used to ignore
   // notifications from the preferences service that we triggered ourself.
   bool updating_preferences_;
 
   // Content setting providers.
   ProviderMap content_settings_providers_;
 
   // Used around accesses to the following objects to guarantee thread safety.
   mutable base::Lock lock_;
 
   // Misc global settings.
   bool block_third_party_cookies_;
   bool is_block_third_party_cookies_managed_;
 
   DISALLOW_COPY_AND_ASSIGN(HostContentSettingsMap);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_