[subresource_filter] Use the SubresourceFilterObserver for PageLoadMetrics

components/subresource_filter/content/browser/content_subresource_filter_driver_factory.cc

Index: components/subresource_filter/content/browser/content_subresource_filter_driver_factory.cc
diff --git a/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.cc b/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.cc
index ebed18f52b6289869060ec0b50fe3e5d2072e1da..f36ca425ee335d0100074dde85ecce01a4db9dc9 100644
--- a/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.cc
+++ b/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.cc
@@ -111,12 +111,9 @@ void ContentSubresourceFilterDriverFactory::OnSafeBrowsingMatchComputed(
     activation_options_ = Configuration::ActivationOptions();
   }
 
-  if (activation_decision_ != ActivationDecision::ACTIVATED) {
-    DCHECK_EQ(activation_options_.activation_level, ActivationLevel::DISABLED);
-    return;
-  }
-
-  DCHECK_NE(activation_options_.activation_level, ActivationLevel::DISABLED);
+  // ACTIVATION_DISABLED implies DISABLED activation level.
+  DCHECK(activation_decision_ != ActivationDecision::ACTIVATION_DISABLED ||
+         activation_options_.activation_level == ActivationLevel::DISABLED);
   ActivationState state = ActivationState(activation_options_.activation_level);
   state.measure_performance = ShouldMeasurePerformanceForPageLoad(
       activation_options_.performance_measurement_rate);