[subresource_filter] Duplicate settings notifications should not be logged

chrome/browser/subresource_filter/subresource_filter_content_settings_manager.h

Index: chrome/browser/subresource_filter/subresource_filter_content_settings_manager.h
diff --git a/chrome/browser/subresource_filter/subresource_filter_content_settings_manager.h b/chrome/browser/subresource_filter/subresource_filter_content_settings_manager.h
index 8f55ef631d9218f5c5f0f2ecc09df845a09a2e1c..3981f2c6114e3947521a9e073706dd6f9c67cb92 100644
--- a/chrome/browser/subresource_filter/subresource_filter_content_settings_manager.h
+++ b/chrome/browser/subresource_filter/subresource_filter_content_settings_manager.h
@@ -89,6 +89,10 @@ class SubresourceFilterContentSettingsManager
 
   HostContentSettingsMap* settings_map_;
 
+  // Used only for metrics so we don't report global changes which just keep
+  // the same value.
+  ContentSetting cached_global_setting_for_metrics_;
+
   // A clock is injected into this class so tests can set arbitrary timestamps
   // in website settings.
   std::unique_ptr<base::Clock> clock_;