Add helper that taps on elements in the webview.

ios/web/public/test/earl_grey/web_view_actions.h

Index: ios/web/public/test/earl_grey/web_view_actions.h
diff --git a/ios/web/public/test/earl_grey/web_view_actions.h b/ios/web/public/test/earl_grey/web_view_actions.h
index 779a10d1e0fec6fafd0dc594e711701197039774..fb5f9d0a6114c1b46469e5bd74fa838471b79c7e 100644
--- a/ios/web/public/test/earl_grey/web_view_actions.h
+++ b/ios/web/public/test/earl_grey/web_view_actions.h
@@ -32,6 +32,10 @@ id<GREYAction> webViewLongPressElementForContextMenu(
     const std::string& element_id,
     bool triggers_context_menu);
 
+// Taps on element |element_id| in the webview of |state|.
+id<GREYAction> webViewTapElement(WebState* state,
+                                 const std::string& element_id);
+
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_TEST_EARL_GREY_WEB_VIEW_ACTIONS_H_