Implement rules removal for WebRequestRulesRegistry

chrome/browser/extensions/api/declarative/url_matcher_unittest.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/extensions/api/declarative/url_matcher.h"
 
 #include "base/string_util.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 134 matching lines @@
   EXPECT_EQ(c2.criterion(), c3.criterion());
   EXPECT_NE(c2.substring_pattern(), c3.substring_pattern());
   EXPECT_NE(c2.substring_pattern()->id(), c3.substring_pattern()->id());
   EXPECT_NE(c2.substring_pattern()->pattern(),
             c3.substring_pattern()->pattern());
 
   // Check that all SubstringPattern singletons are freed if we call
   // ForgetUnusedPatterns.
   SubstringPattern::ID old_id_1 = c1.substring_pattern()->id();
   factory.ForgetUnusedPatterns(std::set<SubstringPattern::ID>());
+  EXPECT_TRUE(factory.IsEmpty());
   URLMatcherCondition c4 = factory.CreateHostEqualsCondition("www.google.com");
   EXPECT_NE(old_id_1, c4.substring_pattern()->id());
 }
 
 TEST(URLMatcherConditionFactoryTest, TestComponentSearches) {
   GURL gurl("https://www.google.com/webhp?sourceid=chrome-instant&ie=UTF-8"
       "&ion=1#hl=en&output=search&sclient=psy-ab&q=chrome%20is%20awesome");
   URLMatcherConditionFactory factory;
   std::string url = factory.CanonicalizeURLForComponentSearches(gurl);
 
@@ skipping 214 matching lines @@
   EXPECT_EQ(1u, matcher.MatchURL(url1).size());
   EXPECT_EQ(0u, matcher.MatchURL(url2).size());
 
   // Removal of first insert.
   std::vector<URLMatcherConditionSet::ID> remove1;
   remove1.push_back(kConditionSetId1);
   matcher.RemoveConditionSets(remove1);
   EXPECT_EQ(0u, matcher.MatchURL(url1).size());
   EXPECT_EQ(0u, matcher.MatchURL(url2).size());
 
+  EXPECT_TRUE(matcher.IsEmpty());
+
   // The cached singleton in matcher.condition_factory_ should be destroyed to
   // free memory.
   int patternId2 = factory->CreateHostSuffixCondition(
       "example.com").substring_pattern()->id();
   // If patternId1 and patternId2 are different that indicates that
   // matcher.condition_factory_ does not leak memory.
   EXPECT_NE(patternId1, patternId2);
 }
 
 }  // namespace extensions