Move LanguageState to the translate component

components/translate/core/browser/translate_driver.h

+// Copyright 2014 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 COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_DRIVER_H_
+#define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_DRIVER_H_
+
+// Interface that allows Translate core code to interact with its driver (i.e.,
+// obtain information from it and give information to it). A concrete
+// implementation must be provided by the driver.
+class TranslateDriver {
+ public:
+  // Returns true if the current page was navigated through a link.
+  virtual bool IsLinkNavigation() = 0;
+
+  // Called when Translate is enabled or disabled.
+  virtual void OnTranslateEnabledChanged() = 0;
+
+  // Called when the page is "translated" state of the page changed.
+  virtual void OnIsPageTranslatedChanged() = 0;
+};
+
+#endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_DRIVER_H_