Add Toolbar test utility classes.

ios/shared/chrome/browser/ui/toolbar/toolbar_test_util.h

+// Copyright 2017 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_SHARED_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_TEST_UTIL_H_
+#define IOS_SHARED_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_TEST_UTIL_H_
+
+#import "ios/web/public/test/fakes/test_navigation_manager.h"
+#import "ios/web/public/test/fakes/test_web_state.h"
+
+class ToolbarTestWebState : public web::TestWebState {
+ public:
+  ToolbarTestWebState();
+
+  double GetLoadingProgress() const override;
+  void set_loading_progress(double loading_progress);
+
+ private:
+  double loading_progress_;
+
+  DISALLOW_COPY_AND_ASSIGN(ToolbarTestWebState);
+};
+
+class ToolbarTestNavigationManager : public web::TestNavigationManager {
+ public:
+  ToolbarTestNavigationManager();
+
+  bool CanGoBack() const override;
+  bool CanGoForward() const override;
+
+  void set_can_go_back(bool can_go_back);
+  void set_can_go_forward(bool can_go_forward);
+
+ private:
+  bool can_go_back_;
+  bool can_go_forward_;
+};
+
+#endif  // IOS_SHARED_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_TEST_UTIL_H_