Context menu egtests, plus related utilities.

ios/web/shell/test/earl_grey/shell_actions.h

Index: ios/web/shell/test/earl_grey/shell_actions.h
diff --git a/ios/web/shell/test/earl_grey/shell_actions.h b/ios/web/shell/test/earl_grey/shell_actions.h
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+++ b/ios/web/shell/test/earl_grey/shell_actions.h
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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_WEB_SHELL_TEST_EARL_GREY_SHELL_ACTIONS_H_
+#define IOS_WEB_SHELL_TEST_EARL_GREY_SHELL_ACTIONS_H_
+
+#include <string>
+
+#import <EarlGrey/EarlGrey.h>
+
+namespace web {
+
+// Action to longpress on element |element_id| in the shell's webview.
+// If |triggers_context_menu| is true, this gesture is expected to
+// cause the context menu to appear, and is not expected to trigger events
+// in the webview. If |triggers_context_menu| is false, the converse is true.
+// This action doesn't fail if the context menu isn't displayed; calling code
+// should check for that separately with a matcher.
+id<GREYAction> longPressElementForContextMenu(const std::string& element_id,
+                                              bool triggers_context_menu);
+
+}  // namespace web
+
+#endif  // IOS_WEB_SHELL_TEST_EARL_GREY_SHELL_ACTIONS_H_