Add UMA to track permission changes from the content settings menu

chrome/browser/ui/webui/options/content_settings_handler.cc

Index: chrome/browser/ui/webui/options/content_settings_handler.cc
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.cc b/chrome/browser/ui/webui/options/content_settings_handler.cc
index 5f9ff7c9f4bf888382e1a43d36c4dd577e0d1dec..d7a99c95c90e4e9540759e9e64cc969be47bbc98 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.cc
+++ b/chrome/browser/ui/webui/options/content_settings_handler.cc
@@ -17,6 +17,7 @@
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/content_settings/web_site_settings_uma_util.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry_factory.h"
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
@@ -1418,6 +1419,9 @@ void ContentSettingsHandler::RemoveException(const base::ListValue* args) {
     RemoveMediaException(args);
   else
     RemoveExceptionFromHostContentSettingsMap(args, type);
+
+  WebSiteSettingsUmaUtil::LogPermissionChange(
+      type, ContentSetting::CONTENT_SETTING_DEFAULT);
 }
 
 void ContentSettingsHandler::SetException(const base::ListValue* args) {