Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/toolbar/toolbar_model_ios.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_MODEL_IOS_H_
+#define IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_MODEL_IOS_H_
+
+#import <UIKit/UIKit.h>
+
+#include "components/toolbar/toolbar_model.h"
+
+class ToolbarModelIOS {
+ public:
+  virtual ~ToolbarModelIOS() {}
+
+  // Returns the |ToolbarModel| contained by this instance.
+  virtual ToolbarModel* GetToolbarModel() = 0;
+
+  // Returns true if the current tab is currently loading.
+  virtual bool IsLoading() = 0;
+
+  // Returns the fraction of the current tab's page load that has completed as a
+  // number between 0.0 and 1.0.
+  virtual CGFloat GetLoadProgressFraction() = 0;
+
+  // Returns true if the current tab can go back in history.
+  virtual bool CanGoBack() = 0;
+
+  // Returns true if the current tab can go forward in history.
+  virtual bool CanGoForward() = 0;
+
+  // Returns true if the current tab is a native page.
+  virtual bool IsCurrentTabNativePage() = 0;
+
+  // Returns true if the current tab's URL is bookmarked, either by the user or
+  // by a managed bookmarks.
+  virtual bool IsCurrentTabBookmarked() = 0;
+
+  // Returns true if the current tab's URL is bookmarked by the user; returns
+  // false if the URL is bookmarked only in managed bookmarks.
+  virtual bool IsCurrentTabBookmarkedByUser() = 0;
+
+  // Returns true if the current toolbar should display the hint text.
+  virtual bool ShouldDisplayHintText() = 0;
+
+ protected:
+  ToolbarModelIOS() {}
+};
+
+#endif  // IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_MODEL_IOS_H_