Add instrumentation hooks to mesaure which subresource filter rules are used.

components/subresource_filter/core/common/url_pattern_index_unittest.cc

Index: components/subresource_filter/core/common/url_pattern_index_unittest.cc
diff --git a/components/subresource_filter/core/common/url_pattern_index_unittest.cc b/components/subresource_filter/core/common/url_pattern_index_unittest.cc
index fcdb9da54c4e4b5b1e70cac6d56e89e4838993e6..658aec7ddee83784d13d26a2c3dd87d051411cb2 100644
--- a/components/subresource_filter/core/common/url_pattern_index_unittest.cc
+++ b/components/subresource_filter/core/common/url_pattern_index_unittest.cc
@@ -52,7 +52,7 @@ class UrlPatternIndexTest : public ::testing::Test {
     const url::Origin document_origin = GetOrigin(document_origin_string);
     return index_matcher_->FindMatch(
         url, document_origin, element_type, activation_type,
-        IsThirdParty(url, document_origin), disable_generic_rules);
+        IsThirdParty(url, document_origin), disable_generic_rules, nullptr);
   }
 
   bool IsOutOfRange(const flat::UrlRule* rule) const {