Add use counters for secure/insecure OpenSearch links and registerProtocolHandler

third_party/WebKit/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp

Index: third_party/WebKit/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
diff --git a/third_party/WebKit/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp b/third_party/WebKit/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
index d6e0cd0fa19872f07a25cab6fe688d66d114dd54..8373c5d194c075ced04cde02449323544fe940b6 100644
--- a/third_party/WebKit/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
+++ b/third_party/WebKit/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
@@ -31,6 +31,7 @@
 #include "core/dom/ExceptionCode.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Navigator.h"
+#include "core/frame/UseCounter.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/StringBuilder.h"
 
@@ -164,6 +165,9 @@ void NavigatorContentUtils::registerProtocolHandler(Navigator& navigator, const
     if (!verifyCustomHandlerScheme(scheme, exceptionState))
         return;
 
+    // Count usage; perhaps we can lock this to secure contexts.
+    UseCounter::count(*document, document->isSecureContext() ? UseCounter::RegisterProtocolHandlerSecureOrigin : UseCounter::RegisterProtocolHandlerInsecureOrigin);
+
     NavigatorContentUtils::from(*navigator.frame())->client()->registerProtocolHandler(scheme, document->completeURL(url), title);
 }