Aggregate DocumentSubresourceFilter counters on page level.

chrome/browser/subresource_filter/subresource_filter_browsertest.cc

Index: chrome/browser/subresource_filter/subresource_filter_browsertest.cc
diff --git a/chrome/browser/subresource_filter/subresource_filter_browsertest.cc b/chrome/browser/subresource_filter/subresource_filter_browsertest.cc
index 5b79e0e8cb5a783b5feb2e8c78de2e566fbd0233..d191c3e62aa1309d92cd86620983aa6f4a0fad90 100644
--- a/chrome/browser/subresource_filter/subresource_filter_browsertest.cc
+++ b/chrome/browser/subresource_filter/subresource_filter_browsertest.cc
@@ -63,6 +63,15 @@ constexpr const char kSubresourceLoadsMatchedRules[] =
 constexpr const char kSubresourceLoadsDisallowed[] =
     "SubresourceFilter.DocumentLoad.NumSubresourceLoads.Disallowed";
 
+constexpr const char kSubresourceLoadsTotalForPage[] =
+    "SubresourceFilter.PageLoad.NumSubresourceLoads.Total";
+constexpr const char kSubresourceLoadsEvaluatedForPage[] =
+    "SubresourceFilter.PageLoad.NumSubresourceLoads.Evaluated";
+constexpr const char kSubresourceLoadsMatchedRulesForPage[] =
+    "SubresourceFilter.PageLoad.NumSubresourceLoads.MatchedRules";
+constexpr const char kSubresourceLoadsDisallowedForPage[] =
+    "SubresourceFilter.PageLoad.NumSubresourceLoads.Disallowed";
+
 // Names of the performance measurement histograms.
 constexpr const char kActivationWallDuration[] =
     "SubresourceFilter.DocumentLoad.Activation.WallDuration";
@@ -607,6 +616,10 @@ void ExpectHistogramsAreRecordedForTestFrameSet(
       expect_performance_measurements && ScopedThreadTimers::IsSupported();
 
   // The following histograms are generated on the browser side.
+  tester.ExpectUniqueSample(kSubresourceLoadsTotalForPage, 6, 1);
+  tester.ExpectUniqueSample(kSubresourceLoadsEvaluatedForPage, 6, 1);
+  tester.ExpectUniqueSample(kSubresourceLoadsMatchedRulesForPage, 4, 1);
+  tester.ExpectUniqueSample(kSubresourceLoadsDisallowedForPage, 4, 1);
   tester.ExpectTotalCount(kEvaluationTotalWallDurationForPage, time_recorded);
   tester.ExpectTotalCount(kEvaluationTotalCPUDurationForPage, time_recorded);