Remove most content-level dependencies from TranslateManager.

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_
 
 #include <string>
 
+class GURL;
 class LanguageState;
 
 // 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;
 
   // Gets the LanguageState associated with the driver.
   virtual LanguageState& GetLanguageState() = 0;
 
   // Translates the page contents from |source_lang| to |target_lang|.
   virtual void TranslatePage(const std::string& translate_script,
                              const std::string& source_lang,
                              const std::string& target_lang) = 0;
 
   // Reverts the contents of the page to its original language.
   virtual void RevertTranslation() = 0;
 
   // Returns whether the user is currently operating in off-the-record mode.
   virtual bool IsOffTheRecord() = 0;
+
+  // Returns the mime type of the current page.
+  virtual const std::string& GetContentsMimeType() = 0;
+
+  // Returns the last committed URL, or an empty GURL if there is no committed
+  // URL.
+  virtual const GURL& GetLastCommittedURL() = 0;
+
+  // Returns the active URL, or an empty GURL if there is no active URL.
+  virtual const GURL& GetActiveURL() = 0;
+
+  // Returns the visible URL, or an empty GURL if there is no visible URL.
+  virtual const GURL& GetVisibleURL() = 0;
+
+  // Returns whether the driver has access to the current page.
+  virtual bool HasCurrentPage() = 0;
+
+  // Returns an int identifying the current page. Should only be called if
+  // |HasCurrentPage()| is true.
+  virtual int GetCurrentPageID() = 0;
 };
 
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_DRIVER_H_