Add a single site view page to view and modify content settings.

chrome/browser/content_settings/host_content_settings_map.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 275 matching lines @@
                                             secondary_pattern,
                                             content_type,
                                             resource_identifier,
                                             value)) {
       return;
     }
   }
   NOTREACHED();
 }
 
+void HostContentSettingsMap::SetNarrowestWebsiteSetting(
+    const ContentSettingsPattern& primary_pattern,
+    const ContentSettingsPattern& secondary_pattern,
+    ContentSettingsType content_type,
+    const std::string& resource_identifier,
+    ContentSetting setting,
+    content_settings::SettingInfo existing_info) {
+  ContentSettingsPattern narrow_primary = primary_pattern;
+  ContentSettingsPattern narrow_secondary = secondary_pattern;
+
+  DCHECK_EQ(content_settings::SETTING_SOURCE_USER, existing_info.source);
+  ContentSettingsPattern::Relation r1 =
+      existing_info.primary_pattern.Compare(primary_pattern);
+  if (r1 == ContentSettingsPattern::PREDECESSOR) {
+    narrow_primary = existing_info.primary_pattern;
+  } else if (r1 == ContentSettingsPattern::IDENTITY) {
+    ContentSettingsPattern::Relation r2 =
+        existing_info.secondary_pattern.Compare(secondary_pattern);
+    DCHECK(r2 != ContentSettingsPattern::DISJOINT_ORDER_POST &&
+           r2 != ContentSettingsPattern::DISJOINT_ORDER_PRE);
+    if (r2 == ContentSettingsPattern::PREDECESSOR)
+      narrow_secondary = existing_info.secondary_pattern;
+  }
+
+  SetContentSetting(
+      narrow_primary, narrow_secondary, content_type, std::string(), setting);
+}
+
 void HostContentSettingsMap::SetContentSetting(
     const ContentSettingsPattern& primary_pattern,
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type,
     const std::string& resource_identifier,
     ContentSetting setting) {
   DCHECK(!ContentTypeHasCompoundValue(content_type));
 
   if (setting == CONTENT_SETTING_ALLOW &&
       (content_type == CONTENT_SETTINGS_TYPE_GEOLOCATION ||
@@ skipping 412 matching lines @@
   }
 
   NOTREACHED();
   return DEFAULT_PROVIDER;
 }
 
 content_settings::PrefProvider* HostContentSettingsMap::GetPrefProvider() {
   return static_cast<content_settings::PrefProvider*>(
       content_settings_providers_[PREF_PROVIDER]);
 }