Implement rules removal for WebRequestRulesRegistry

chrome/browser/extensions/api/declarative/substring_set_matcher.h

Index: chrome/browser/extensions/api/declarative/substring_set_matcher.h
diff --git a/chrome/browser/extensions/api/declarative/substring_set_matcher.h b/chrome/browser/extensions/api/declarative/substring_set_matcher.h
index 149ac14db241c9aea43ae33d882cf3e1bcdf44e1..be6403d95689483d0b8849db1414b556dd659fde 100644
--- a/chrome/browser/extensions/api/declarative/substring_set_matcher.h
+++ b/chrome/browser/extensions/api/declarative/substring_set_matcher.h
@@ -68,6 +68,9 @@ class SubstringSetMatcher {
   bool Match(const std::string& text,
              std::set<SubstringPattern::ID>* matches) const;
 
+  // Returns true if this object retains no allocated data. Only for debugging.
+  bool IsCompletelyEmpty() const;

[Matt Perry, 2012/03/28 18:59:52]

nit: IsEmpty should be fine... I wouldn't expect it to return true if it's only
half empty :)

[battre, 2012/03/28 19:18:42]

Done.

+
  private:
   // A node of an Aho Corasick Tree. This is implemented according to
   // http://www.cs.uku.fi/~kilpelai/BSA05/lectures/slides04.pdf