Restrict WebShare to secure contexts.

third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp

Index: third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp
diff --git a/third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp b/third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp
index 846718089bbe4a232f1646b2c32ce259bc364aca..a4c6c9b8dd55055cb5ee02d82c8642ba7c3b1e0e 100644
--- a/third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp
+++ b/third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp
@@ -82,6 +82,11 @@ const char* NavigatorShare::supplementName()
 
 ScriptPromise NavigatorShare::share(ScriptState* scriptState, const ShareData& shareData)
 {
+    String errorMessage;
+    if (!scriptState->getExecutionContext()->isSecureContext(errorMessage)) {
+        DOMException* error = DOMException::create(SecurityError, errorMessage);
+        return ScriptPromise::rejectWithDOMException(scriptState, error);
+    }
     if (!UserGestureIndicator::utilizeUserGesture()) {
         DOMException* error = DOMException::create(SecurityError, "Must be handling a user gesture to perform a share request.");
         return ScriptPromise::rejectWithDOMException(scriptState, error);