Clears out external protocol data when cookies and site data is cleared.

chrome/browser/external_protocol/external_protocol_handler.cc

Index: chrome/browser/external_protocol/external_protocol_handler.cc
diff --git a/chrome/browser/external_protocol/external_protocol_handler.cc b/chrome/browser/external_protocol/external_protocol_handler.cc
index 29f98ed5cc60d7d2187b9138a1103399772be326..b9ce1eba4e090fb5b6f669fc7d3101aa98049730 100644
--- a/chrome/browser/external_protocol/external_protocol_handler.cc
+++ b/chrome/browser/external_protocol/external_protocol_handler.cc
@@ -345,3 +345,11 @@ void ExternalProtocolHandler::RecordHandleStateMetrics(bool checkbox_selected,
 void ExternalProtocolHandler::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterDictionaryPref(prefs::kExcludedSchemes);
 }
+
+// static
+void ExternalProtocolHandler::ClearData(Profile* profile) {
+  PrefService* prefs = profile->GetPrefs();
+  if (prefs) {  // Maybe NULL during testing.
+    prefs->ClearPref(prefs::kExcludedSchemes);

[dominickn, 2017/02/10 03:10:29]

I don't think you need the if check here - do the tests pass without it? prefs
shouldn't be null when this is called.

[ramyasharma, 2017/02/15 05:03:36]

Thanks I had not tried it without the check

+  }
+}