Context menu egtests, plus related utilities.

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
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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_PUBLIC_TEST_EARL_GREY_WEB_VIEW_ACTIONS_H_
+#define IOS_WEB_PUBLIC_TEST_EARL_GREY_WEB_VIEW_ACTIONS_H_
+
+#include <string>
+
+#import <EarlGrey/EarlGrey.h>
+
+#import "ios/web/public/web_state/web_state.h"
+
+namespace web {
+
+// Action wrapper that performs |action| on the webview of |state|.
+// The action will fail (in addition to its own failure modes) if |element_id|
+// can't be located, or if it doesn't trigger a mousedown event on |element_id|
+// inside the webview.
+id<GREYAction> webViewVerifiedActionOnElement(WebState* state,
+                                              id<GREYAction> action,
+                                              const std::string& element_id);
+
+// Executes a longpress on element |element_id| in the webview of
+// |state|. 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> webViewLongPressElementForContextMenu(
+    WebState* state,
+    const std::string& element_id,
+    bool triggers_context_menu);
+
+}  // namespace web
+
+#endif  // IOS_WEB_PUBLIC_TEST_EARL_GREY_WEB_VIEW_ACTIONS_H_