Make third-party cookie blocking take precedence over any rules that match all hosts.

chrome/common/content_settings_pattern.h

Index: chrome/common/content_settings_pattern.h
diff --git a/chrome/common/content_settings_pattern.h b/chrome/common/content_settings_pattern.h
index 858d210cc2fa6551aa133049cab41b386035be00..13b75e9abad38a78741f77eea79c46128b322d92 100644
--- a/chrome/common/content_settings_pattern.h
+++ b/chrome/common/content_settings_pattern.h
@@ -177,6 +177,9 @@ class ContentSettingsPattern {
   // True if |url| matches this pattern.
   bool Matches(const GURL& url) const;
 
+  // True if this pattern matches all hosts (i.e. it has a host wildcard).
+  bool MatchesAllHosts() const;
+
   // Returns a std::string representation of this pattern.
   const std::string ToString() const;