Preparatory work for adding content exceptions from the tab cookie view.

chrome/browser/host_content_settings_map.h

Index: chrome/browser/host_content_settings_map.h
diff --git a/chrome/browser/host_content_settings_map.h b/chrome/browser/host_content_settings_map.h
index 876fa71388ab7da802ed2a09d9692b797cbaddd8..fc38afcc7086927dcb4e456135b6d6273bcda4f5 100644
--- a/chrome/browser/host_content_settings_map.h
+++ b/chrome/browser/host_content_settings_map.h
@@ -142,6 +142,13 @@ class HostContentSettingsMap
                          ContentSettingsType content_type,
                          ContentSetting setting);
 
+  // Convenience method to add a content setting for a given URL, making sure
+  // that there is no setting overriding it.
+  // This should only be called on the UI thread.
+  void AddExceptionForURL(const GURL& url,
+                          ContentSettingsType content_type,
+                          ContentSetting setting);
+
   // Clears all host-specific settings for one content type.
   //
   // This should only be called on the UI thread.