Add ContextMenuCoordinator.

ios/chrome/browser/ui/context_menu/context_menu_wrangler_unittest.mm

+// Copyright 2012 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.
+
+#import "ios/chrome/browser/ui/context_menu/context_menu_wrangler.h"
+
+#import <UIKit/UIKit.h>
+
+#include "base/mac/scoped_nsobject.h"
+#import "ios/web/public/web_state/context_menu_params.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+// Fixture to test ContextMenuWrangler.
+class ContextMenuWranglerTest : public PlatformTest {
+ public:
+  ContextMenuWranglerTest() {
+    _window.reset(
+        [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]);
+    [_window makeKeyAndVisible];
+  }
+
+ protected:
+  base::scoped_nsobject<ContextMenuWrangler> _menuWrangler;

[Eugene But (OOO till 7-30), 2016/05/13 01:23:56]

s/_menuWrangler/menu_wrangler_

[michaeldo, 2016/05/17 18:03:03]

Done.

+  base::scoped_nsobject<UIWindow> _window;

[Eugene But (OOO till 7-30), 2016/05/13 01:23:56]

s/_window/window_

[michaeldo, 2016/05/17 18:03:03]

Done.

+};
+
+// Tests the context menu reports as visible after presenting.
+TEST_F(ContextMenuWranglerTest, DisplayContextMenu) {
+  web::ContextMenuParams params;
+  params.location = CGPointZero;
+  params.view.reset([_window retain]);
+  _menuWrangler.reset(
+      [[ContextMenuWrangler alloc] initWithContextMenuParams:params]);
+
+  [_menuWrangler addItemWithTitle:@"foo" action:nil];
+  [_menuWrangler addItemWithTitle:@"bar"
+                           action:^{
+                           }];
+
+  [_menuWrangler present];
+
+  EXPECT_TRUE([_menuWrangler isVisible]);
+}