Web Share: Refactor Mojo interface to now return an enum error.

third_party/WebKit/LayoutTests/webshare/share-types.html

Index: third_party/WebKit/LayoutTests/webshare/share-types.html
diff --git a/third_party/WebKit/LayoutTests/webshare/share-types.html b/third_party/WebKit/LayoutTests/webshare/share-types.html
index ac183c28993acd9e8d46da47c17901b1feb97baf..dcdf202539d9d2beba329562b2f3b98cf2341f2d 100644
--- a/third_party/WebKit/LayoutTests/webshare/share-types.html
+++ b/third_party/WebKit/LayoutTests/webshare/share-types.html
@@ -5,8 +5,8 @@
 <script src="resources/mock-share-service.js"></script>
 <script>
 
-share_test((t, mock) => {
-  mock.pushShareResult('384957', '[object Object]', '', null);
+share_test((t, webshare, mock) => {
+  mock.pushShareResult('384957', '[object Object]', '', webshare.ShareError.OK);
   return callWithKeyDown(() => navigator.share({title: 384957, text: {}}));
 }, 'share of types other than string (expect implicitly converted to string)');